Stratigraphic sections of the Phosphoria formation in Idaho

McKelvey, V.E., Davidson, D.F., O’Malley, F.W., Smith, L.E. · 1951 · Report

The first of a series of reports giving detailed stratigraphic sections of the Phosphoria formation in the Western phosphate field as measured and described

This 1951 document, Stratigraphic sections of the Phosphoria formation in Idaho, is preserved in the Mountain Man Mining Library for research and reference. Original source: pubs.usgs.gov.

UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN IDAHO by V. E. McKelvey, D. F. Davidson. F. W. 0° MaLley, L. C. Smith, F. C. Armstrong, and R. P. Sheldon uotuu c 4i jib xst.4.- rrik % r, 'P4 MINERAL DEPOSITS BRANCH Spokane) Washington July 1951 OPEN FILE Tr.i s R~i s preliminary spd has not been e t c cr r conformity standards

iplu))111 1 TABLE OF CONTENTS Page Introduction Abstract of sections Diamond Drill Hole 8, Fort Hall Mine. Lot no. 1279 .. Diamond Drill Hole 9, Fort Hall Mine. Lot no. 1280.. Caldwell Canyon. Lot no. 1260. Mabie Canyon. Lot no. 1210. Spectrographic analyses Condi'. Lot no. 1200. Spectrographic analyses Diamond Drill Hole 6, Slug Creek Valley. Lot no, 1277. Diamond Drill Hole 3, Middle Sulphur Canyon. Lot no. 1274. Diamond Drill Hole 4, Middle Sulphur Canyon. Lot no, 1275. Diamond Drill Hole 5, Southern Fork of Johnson Creek. Lot no. 1276. North Dairy. Lot no. 1212. Swan Lake Gulch. Lot no. 1265. Dry Creek. Lot no. 1268.

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN IDAHO by V. E. McKelvey, D. F. Davidson, F. W. 0° Malley, L. E. Smith, F. C. Armstrong, and R. P. Sheldon INTRODUCTION The first of a series of reports giving detailed stratigraphic sections of the Phosphoria formation in the Western phosphate field as measured and described by the Geological Survey will be released as Circulars within the next few months. Because of the needs of industry for many of these data during the 1951 field season, and in view of the unavoidable delays attendant on public cation, the tabular data to be included in these Circulars are hereby placed on open file in simple reproduction form (prepared by Oralid from photographic negatives) and without explanatory text so that immediate use may be made of the data. The tables include data on sections in four states: Montana, Idaho, Wyoming, and Utah; and the tables for each of these states are bound together as individual reports. The tables include name and location of section measured, brief description of geologic setting, acknowledgments for field and analytical work, abstract data on the sections (bed number, rock name, sample number, and thick­ ness), and analytical data on the samples. The analytical data include reports on P 7O5 and acid insoluble for all samples and additional analyses, such as Fe703, loss on iehition. F, and V,Or., for selected samples. Spectrographic analyses for a large nuthber of elements are included (amples from selected localities, and special analyses have been made of a few samples. These reports are placed on open file at the offices of the Geological Survey in Washington, D. C., Spokane, Washington, Salt Lake City, Utah, and Montpelier, Idaho, and at the offices of the Idaho Bureau of Mines and Geology, Moscow, Idaho, the Montana Bureau of Mines and Geology, Butte, Montana, and the Wyoming Geological Survey, Laramie, Wyoming, and the University of Utah, Salt Lake City, Utah.

DIAMOND DRILL 11101.2 It, PORT BALL MUNE. IDAHO. LOT NO. 1271. Part at phospinne shale member at Pboeplions formation cored te inamand drill bole I, near diamond drill bole /37 at Fort Roil Wise at J. R. Simplot Compaisy. sec. 14, T. 4 S., R. 37 R., 111Usgbani Cavity. Idaho. Role drilled in October 13411 by U. S. Bureau at Mires, A. t. Long in charge, sod core smasered and sampled by D. F. Davidson. Samples analysed by U. S. Bureau at Items Laboratory, Albany, Oregon. Cosmilistive Thickness s Bed eall1P111 Tbkbless Rock descripuao diickseess percent P,O, no. no. (feet) P 20 S (feet) (cutnulatfirej

P -3S alledistene and phosphate rock DP1E1-1144 P -34 bledinsme and phosphate rock OFD-1143 1S.0 P -31 Limestone, arglilacoons DIFD- 1144 S.2 S.0 P -32 Phosphate rock, argillaceous. columns DFD-1147 S.7 P -31 kludettine. phosplisuc. .:alcareons DFD-11411 P -30 Limestone DFD - 1141 P 1111iiiestone, phosphatic MOID-115, P -23 Core missing P -27 1111101114ese, phosphatic E4MD-1206 P -26 11010 rock, calcareous. argil/amen C41)-1107 P -IS Pkompbsita rock, calcarooes. argtUaosous DFD- 1204 P -24 is rook, italcaroces DFD-1803 P -23 Lbwslone, pkosplimithe DFD - 3336 MI P -24 Plisephese rock two-1244 P -21 1Pliosphsto rock, argillaceoss DPD-1343 P -141 illodotate, pboopkaUc DPD-1210 P -13 Pimplists rook, argillac000s. calcareous DIPS- 1231 MEI P -IS NewWe rock, argillaceous DM-1232 P -17 Plimphakorm44 argIllammus DP1D- 1235 24.S P -16 PhOssibete rock, argillacsous pro-1234 MI,. P -13 Core P -14 aludsiturs,1114phinic DFD-1235 P -13 Modetom. phooplieur DFD- 12 S6 46. S P -12 phosphate rest DFD- 1257 33.S P -11 PismoIsta rook, argalacomell DFD- It S4 Lt. 2 P -10 PlumpWe rock sod osullsamo DFD- 12431 P - 1 Pletsphasa rock and assiseseto DFD-11127 P 0 Pbsophisa rook and modstours DFD- ISA P - 7 Lhasotone DFD- 14176 Cosidathe dista uihoteploto diet to mussing tritormatioo. Computations start from

Bed so. Rock description -6 Iftsephate rock P - S Lkiii111110011. pliossolmaic P 4 14111.11mis reek, arettlacieous P - 3 Fttimiebsto rock P - 2 Uniestoses arglUseeous. phosphatic - 1 Lhasehals. argillaceona F1711LIAmostame, argillaceous Nato ismosapiewasse of ciumialtive amts. Sesspie 1116oknesa (feet) DIM- 1977 DTD-19111 1. A DTD-1979 DIM-1980 DIM- 2170 O. S MD-2293 Wells faraiatios Chemical analysis m ot

P 0 2S. 0 1S. 9 S.4 Cuaralatihnt thickness (feet) 4S. 2 SO. 3 S1.1 Thackaress ii percent POs (cananlattl. 4 36.1 S 445.37+5

DIAMOND DRILL HOLE 9, FORT HALL. MINE, IDAHO. LOT NO. 1280. Part of phosphatic shale member of Phosphoria formation sampled from diamond drill hole 9 near diamond drill hole 237 at Fort Hall Mine of J. R. Simplot Company, sec. 14, T. 4 S., R. 37 E.. Bingham County, Idaho. Hole drilled in October 1948 by U. S. Bureau of Mines, A. E. Long in charge, and measured and sampled by D. F. Davidson. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. 4:1 6041 4,41VVV IINIV VVVISV VVV 1.$ NN NNN w aw a w wwww e 044 4.01 0...40,0. O -ho w &w ... 0.-N wah w a...1 011 ,0 0.-Nw dl. Chemical analyses Cumulative Thickness x Bed Sample Thickness (percent) Rock description thickness percent P,Os no. (feet) Acid no. (feet) (cumulatf4e; P2P5 insoluble Phosphatic shale member of Phosphoria formation-lower beds only Mudstone, calcareous DFD-2297 Mudstone, phosphatic DFD-2298 Mudstone, phosphatic, calcareous DFD - 2299 Limestone DFD-2300 Mudstone, phosphatic, calcareous DFD- 3035 Core missing Limestone DFD- 2468 0.56* Mudstone, phosphatic DFD- 2469 Phosphate rock, argillaceous DFD-2470 Phosphate rock, calcareous, argillaceous DFD-2471 Phosphate rock and calcareous mudstone DFD-2472 Phosphate rock and mudstone DFD-2473 Phosphate rock, calcareous, argillaceous DFD-2474 Phosphate rock, calcareous DFD-2475 Phosphate rock, argillaceous DFD-2531 Phosphate rock, argillaceous DFD-2332 Limestone DFD-2533 Mudstone, phosphatic, calcareous DFD- 2534 Phosphate rock and mudstone DFD-2535 Phosphate rock and mudstone DFD -2536 353. OS Phosphate rock and mudstone DFD-2537 Limestone DFD-2538 0. S Core missing Mudstone, phosphatic, calcareous DFD-2539 34.75* Phosphate rock and mudstone DFD - 2540 Phosphate rock and mudstone DFD-2541 Phosphate rock DFD-2542 Phosphate rock and mudstone DFD-2543 Limestone, argillaceous DFD- 2544 Phosphate rock, calcareous DFD- 2545 Cumulative data incomplete due to missing information. Computations start from zero after interruption.

Chemical analyses Cumulative Thickness z Bed Sample Thickness (percent Rock description thickness percent P,05 DO. no. (feet) cid P2O (feet) (cumulatiNei insoluble P - 4 P - 3 P - 2 P - 1 Limestone Core missing Phosphate rock Limestone, argillaceous DFD - 2546 DFD -2547 DFD-2548 35.75* 36.87** Wells formation w- 3 Limestone, argillaceous DFD- 2549 0. T w- 2 Core missing

w- I Limestone, argillaceous DFD-2550 31. T 4,83* Cumulative data incomplete due to missing information. Computations start from zero after interruption. Note incompleteness of cumulative data.

CALDWELL CANYON, IDAHO. LOT NO. 1260. Phosphatic shale member of Phosphor's, formation sampled in bulldozer trench on north side of Caldwell Canyon, sec. 1, T. 8 S., R. 43 E., Caribou County, Idaho, on east limb of Slug Creek syncline. Beds strike N. 10* W. and dip 40* E. Section measured by R. A. Hoppin, D. F. Davidson, and F. W. Os Malley and sampled by R. A. Smart, R. P. Sheldon, R. G. Waring, and T. K. Rigby in August 1948. Samples analyzed by U. S. Bureau of Mines. Albany, Oregon. Chemical anal ses rcent Cumulative Thickness z Bed Sample Thickness Rock description oss on thickness percent 12,0 no. PO s A103 no. (feet) z Al2 Fe2O3 Fec 5 ignition insoluble (feet) (cumulate Rez member of Phosphoria formation-basal bed only Cheri WOM- 17S0 3. S Phosphatic shale member of Phosphoria formation' P-84 Mudstone WM-1749 S.2 S.70 P-83 Mudstone MOM-1748 P-82 Mudstone WOM -1747 P-81 Mudstone; fos. col. no. 48-JES-1892 WOM-1746 P-80 Mudstone, calcareous WOM-1745 16. Z I P-79 Limestone, argillaceous; fos. col. no. 48-JES-1811 WOM-1744 P-78 Mudstone, calcareous; fos. col. no. 48-JES- 187 .WON-1743 Z. 7 P-77 Mudstone, phosphatic WOM-1742 P-76 Mudstone W0111-1741 . 33. Z 1 P-7S Phosphate rock, argillaceous WOM-1740 4S.26 P-74 Mudstone; fos. col. no. 48-JES-186 W061-1780 Z. S P-73 Mudstone, calcareous; fos. col. no. 48 - JES- 185 WOM-1779 P-72 Phosphate rock WON 1778

P-7I Phosphate rock; fos. col. no. 48-JES-184 WM-1777 P-70 Mudstone WOM-1776 P-69 Phosphate rock, calcareous WOM-1775

9. S ZO. 8 P-68 Phosphate rock WOM-1774

S. S Limestone concretion; fos. col. no. 48 - JES- 183 WM-1773 (0.9) S.3 P-67 Phosphate rock, calcareous and phosphatic calcareous mudstone; fos. col. no. 48-.TES-182 WOM-1772 P-66 Mudstone, phosphatic WOM - 1771

- 4S. 0 P-6S Phosphate rock, argillaceous DFD- 1790 P-64 Mudstone; fos. col. no. 48-JES-181 DFD- 1789

2 The thinness of the Phosphatic shale member is probably due to faulting. Fossil collection by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey.

Chemical analyses (percent) Cumulative Thickness x Bed Sample Thickness Rock description Loss on Acid thickness percent P,05 no. no. (feet) P205 A1203 Fe2O3 ignition insoluble (feet) (cumulatiVe) Limestone lens argillaceous DFD- 1788 (0.9) P-63 Mudstone, phosphatic, fos. col. no. 48-JES-180 DFD- 1787 P-62 Mudstone, phosphatic DFD- 1786 O. 7 P-61 Phosphate rock, argillaceous; fos. col. no. 48 -JES- 179 DFD- 1785 P-60 Mudstone, phosphatic DFD- 1784 P-59 Mudstone, phosphatic; fos. col. no. 48 -JES- 178 DFD- 1783 P-58 Mudstone, phosphatic, DFD- 1782 P- S7 Mudstone; fos. col. no. 48-JES -177 DFD- 1781 P- S6 Mudstone DFD- 1760 P- SS Mudstone DFD- 1759 P- S4 Mudstone, phosphatic DFD- 1758 P-53 Phosphate rock, argillaceous DFD- 1737 P-32 Mudstone, phosphatic DFD- 1756 P-51 Mudstone, phosphatic DFD- 1755 P- SO Mudstone DFD- 1734 P-49 Mudstone, phosphatic DFD- 1753 P-48 Mudstone DFD- 1752 P-47 - Mudstone; fos. col. no. 48-JES-176 *DFD- 1751 P-46 Phosphate rock and phosphatic mudstone WOM -1810 SO. 10 P-45 Mudstone, phosphatic WOM - 1809 S5.6 P-44 Mudstone wpm 1808 S. 1 SO. 30 Many of the beds from P-27 to P-43 show prominent shearing that probably represents faulting and accounts for the abnormally small thickness of the phosphatic shale member at this locality. P-43 Phosphate rock WOM- 1807 SO. 70 P-42 Mudstone, phosphatic WON-1806 P-41 Mudstone WPM-1805 S31.42 P-40 Mudstone WON-1804 P-39 Mudstone WOM -1803 P-38 Mudstone, phosphatic WOM - 1802 P-37 Mudstone WOM - 1801 2.8? P-36 Mudstone, calcareous WOM - 1800 P-3S Phosphate rock WON -1799 P-34 Mudstone, phosphatic WOM - 1798 9.S P-33 Phosphate rock, argillaceous W0114-1797 P-32 Mudstone, calcareous WON-1796 58. S P-31 Mudstone, phosphatic W011 - 1795 0.S P-30 Mudstone, phosphatic; fos. col. no. 48-JES- 175? WON -1794

P-29 P-28 P-27 P-26 P-25 Kudstone Kudstone Mudstone Kudstone, phosphatic, calcareous Kudstone, phosphatic WOK-1793 Wpm-1792 WOK-1791 WOK-1820 WOK-1819 P-24 P-23 P-22 P-21 P-20 Mudstone, phosphatic Phosphate rock, argillaceous Phosphate rock, argillaceous Limestone Limestone; foe. col. no. 48-JES- 174 WOK-1818 WOK-1817 WOK-1816 WOK-1815 WOK-1814 84,30 P-19 P-18 P-17 P-16 P- IS Phosphate rock, argillaceous Kudstone, phosphatic, calcareous Mudstone, phosphatic; fos. col. no. 48 -JES- 173 Limestone; fos. col. no. 48 - JES- 172 Phosphate rock, argillaceous WOK-1813 WOK-1812 WOK-1811 RAH- 1826 RAH- 1825 S. 6 P-14 P-13 P-12 P-11 P-10 Phosphate rock Phosphate rock, argillaceous Limestone, argillaceous; fos. col. no. 48-JES- 171 Phosphate rock Phosphate rock RAH- 1824 RAH- 1823 RAN- 1822 RAH- 1821 RAH- 1770 20. S 96. SO 1,000.15 1,037.98 P- 9 P- 8 P- 7 P- 6 P- S Phosphate rock Phosphate rock Limestone, phosphatic, argillaceous; fos. col. no. 48-JES- 170 Phosphate rock Limestone RAH- 1769 RAH- 1768 RAH- 1767 RAH- 1766 RAH- 1765 1.S Z. 1 1,103.58 1,151.58 1,164.19 1,191.09 1,195.99 P- 4 P- 3 P- 2 P- 1 Phosphate rock; fos. col. no. 48 - JES- 169 Limestone; foe. col. no. 48 -JES- 168 Limestone and phosphate rock; fos. col. no. 48 -MS- 167 Phosphate rock RAH- 1764 RAH- 1763 RAH- 1762 RAH- 1761 3.3? 3. S 1,279.48 1,285.23 1,301.15 1,436.25 Wells formation CV-1 Limestone; foe. col. no. 48 - J Es- 166 RAH- 1739 4.S

: 'AHO. 1210 , Phosphatic shale member of Phosphoria formation sampled in bulldozer trench in Mabie Canyon. NW NE sec. 10, T. 8 S., R. 44 E., Caribou County, Idaho, on east limb of Dry Valley anticline. Section measured by R. M. Campbell, V. E. McKelvey, and R. A. Weeks and sampled by Campbell and Weeks in September and October 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Bed no. Rock description Sample no. Thickness (feet) P O Chemical anal ses A10 Fe2O3 F oss on ignition Acid insoluble Cumulative thickness (feet) Thickness x percent P05 (cumulatiVe) Rex member of Phosphoria formation R R R R R S Chert Limestone, argillaceous Chert Mudstone, calcareous; fos. col. no. 47-HW-2591 Mudstone, calcareous and chert VEM-470-47 VEM -469-47 VEM-468-47 VEM-467-47 VEM-46647 0.5 , Phosphatic shale member of Phosphoria formation P P P P P Mudstone. calcareous Phosphate rock, argillaceous, calcareous; fos. col. no. 47-HW-258 Mudstone, calcareous; fos. col. no. 47-HW-257 Mudstone, calcareous Mudstone VEM-465-47 VEM-464-47 V EM-463-47 VEM-462-47 VEM-461-47 . S. 3 P -165 P -164 P -163 P -162 Limestone lens, argillaceous. in top of bed P- I 6S Mudstone Mudstone, calcareous Miudstcme, calcareous Mudstone, calcareous VE M -460-47 VEM -459-47 VEM-45$-47 VEM-457-47 VEM-456-47 (0.0-0.5) 14. S j j P P P P P Limestone; fos. col. no. 47-HW-255 Mudstone, calcareous; fos. col. no. 47-HIN-2S4 Mudstone, calcareous; fos. col. no. 47-HW-254 Limestone, argillaceous, contains phosphatic nodules Mudstone, calcareous VEM-455-47 VEM-454-47 VEM-453-47 VEM-452-47 VEM-451-47

50, 07 P P Phosphate rock, argillaceous. calcareous? Mudstone; fos. col. no. 47-11W-253 I VEM- 450-4 7 VEM-449-47 j ,

P -154 P -153 P -152 P -151 P -150 Limestone, argillaceous; fos. col. no. 47-HW-252 Mudstone Phosphate rock Phosphate rock Phosphate rock VEM -448-47 VEM -447-47 VEM -446-47 VEM -445-47 VEM -444-47 0.S 0.S S. 7 ZS. 8 S. 0 P -149 Mudstone, calcareous; fos. col. no. 47-HW-251 VEM-443-47 P -148 P -147 P -146 P -145 Phosphate rock, argillaceous Phosphate rock Phosphate rock Mudstone, phosphatic; fos. col. no. 47-HW-250 VEM-442-47 VEM-441-47 VEM-440-47 VEIN-439-47 P -144 P -143 P -142 P -141 P -140 Phosphate rock Phosphate rock and mudstone Phosphate rock and mudstone Mudstone, calcareous Phosphate rock and calcareous mudstone VEM-438-47 VEM-437-47 VEM -436-47 VEM -435-47 VEM-434-47 2.S 1.1S 40. S P -139 P -138 P -137 Phosphate rock Phosphate rock Phosphate rock VEM-433-47 VEM-432-47 VEM-431-47 3S. 1 0.S S. 5 Limestone lens 0.2 foot below P -136 top of bed P-136 Phosphate rock VEM-430-47 VIM-429-47 (0. 0-0. 5) P -13S P -134 P -133 P -132 P -131 Phosphate rock Phosphate rock Phosphate rock and mudstone Phosphate rock, argillaceous Phosphate rock VEM-428-47 VEM-427-47 VEM -426-47 VEM -425-47 VEM-424-47 P -130 P -129 P -128 P -127 P -126 Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous Mudstone, phosphatic VEM-423-47 VEM-422-47 VEM-421-47 VEM -420-47 VEM-419-47 18. S 7.S 30. S SO. 2 P -125 P -124 P -123 P -122 P -121 Mudstone. phosphatic Illudatone, phosphatic Mudstone Limestone, argillaceous; fos. col. no. 47-HW-249 Mudstone, phosphatic VEM-418-47 VEM -417-47 VEM-416-47 VEM -415-47 VEM -414-47 6.S S1.3 62. S '51. 5 S4.0 z Fossil collection by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Sample lost.

Chemical anal ses rcent Cumulative Thickness x Thickness 1Bed Sample oss on thickness percent P,0 Rock description Fe203 no. (feet) P205 A1203 Fe2O3 F no. ignition insoluble (feet) (cumulatiVei -120 Mudstone. phosphatic -119 Phosphate rock, argillaceous -118 Mudstone, phosphatic -117 Mudstone, phosphatic -116 Mudstone VEM-413-47 VEM-412-47 VEM -411-47 VEM-410-47 VEM-409-47 8. S S8.00 -11S Mudstone. phosphatic -114 Mudstone, phosphatic -113 Mudstone. phosphatic, contains phosphatic nodules -112 Phosphate rock, argillaceous -111 Mudstone, contains phosphatic nodules VEM-408-47 VEht -407-47 VEM -406-47 VEM-405-47 VEM-404-47 Z.9 Mudstone, phosphatic Mudstone. phosphatic Mudstone, phosphatic Mudstone; fos. col. no. 47-HW-248 Limestone; fos. col. no. 47-HW-243 VEM -403-47 VEM -402-47 VEM-401-47 VEM-400-47 V EM -399-47 6. S Mudstone Phosphate rock and mudstone Phosphate rock, argillaceous Mudstone Mudstone VEM-398-47 VEM -397-47 VEM-396-47 VEM-395-47 VEM-394-47 S. 4 Z. S

Mudstone, calcareous Mudstone, phosphatic Mudstone Mudstone Mudstone VEM-393-47 VEY-392-47 VEM-391-47 VEM -390-47 VEY-389-47 10. T Z. S Ob OP - 9S Mudstone Phosphate rock Mudstone Mudstone, calcareous, phosphatic Mudstone and phosphate rock VEM -388-47 VEM-387-47 VEM- 386-47 VEY-385-47 VEM- 384-47 3. T Phosphate rock, argillaceous Mudstone Mudstone and phosphate rock; fos. col. no. 47-HW-242 Mudstone Limestone, argillaceous VEM-383-47 VIM-382-47 VEM - 381-47 VEM-380-47 VEM-379-47 S. 0 S4.4 1,004.45 - 84 Mudstone and phosphate rock Mudstone VEM-378-47 VEM-377-47 1,032.48

P - 83 P - 82 P - 81 P - 80 P - 79 Mudstone and calcareous mudstone Mudstone and phosphate rock Mudstone and phosphate rock Mudstone Phosphate rock VEM-376-47 VEM-375-47 VEM-374-47 VEM-373-47 VEM -372-47 S. 4 1,033.60 1,040.95 1,069.37 1,071.07 1,103.27 P - 78 P - 77 P - 76 P - 75 P - 74 Phosphate rock and mudstone Mudstone Phosphate rock and mudstone Mudstone, phosphatic Mudstone VEM-371-47 VEM-370-47 VEM -369-47 VIDA - 368-47 VEM-367-47 22. S 3.S S. 5 10. S S. 2 1, 118.25 1, 120.49 1, 140. 74 1, 144. 58 1, 148. 43 P - 73 P - 72 P - 71 P - 70 P - 69 Mudstone, phosphatic Mudstone Muds tone Phosphate rock, argillaceous Phosphate rock VEM - 366-47 VEM-365-47 VEM - 364-47 VEM -363-47 VEM - 362-47 S. 3 115,80 1, 161.03 1, 162. 20 1, 166.04 1, 172. 88 1, 189. 89 P - 68 Mudstone, phosphatic P - 67 Mudstone, phosphatic P - 66 Mudstone, phosphatic P - 6S Mudstone, phosphatic P 64 Mudstone, calcareous, phosphatic VEM-361-47 VEM-360-47 VEM-359-47 VEM - 344-47 VEM-343-47 SO. 7 SS. 0 1,198.77 1,212.07 1,218.63 1,222.27 1,240.45 P - 63 Phosphate rock, calcareous, argillaceous P - 62 Mudstone, calcareous, phosphatic P - 61 Mudstone, calcareous; fos. col. no. 47-HW-241 P - 60 Limestone; fos. col. no. VEM -342-47 VEM-341-47 VEM -340-47 1,256.89 1,269.53 1,271.81 47-HW-240 P - S9 Limestone; fos. col. no. 47-HW-239 VEM -339-47 VEM-338-47 0.S 1,271.96 1,272.41 P -S8 Mudstone, calcareous; fos. col. no. 47-HW-238 P 57 Limestone; los. col. no. 47-HW-237 P S6 Cbert; fos. col. no. 47-HW-236 P SS Mudstone; fos. col. no. 47-HW-235 P -S4 Mudstone, calcareous VEM-337-47 VEM-336-47 VEM-335-47 VEM-334-47 VEM-333-47 1,274.39 1,275.47 1,275.77 1, 277. 57 1, 281.92 P - S3 Mudstone P - 52 Mudstone, calcareous P - SI Mudstone1 fos. col. no. VEM-332-47 VEM-331-47 3.S 1, 284.81 1,291.37 47-IIW- 234 P - SO Mudstone P - 49 Mudstone VEM-330-47 VEM-329-47 VEM-328-47 1,295.81 1,306.69 1,309.41

Bed no. Rock description Sample Thickness (feet) P205 Chemical anal ses 4L1203 Fe203 F oss on ignition insoluble Cumulative thickness (feet) Thickness x percent P,05 (cumulati.re, P - 48 P - 47 Mudstone, phosphatic Mudstone RMC-104-47 RMC-103-47 Z. 0 3,5 SZ. 6 1,330.81 1,334.41 P - 46 Mudstone and calcareous P - 4S mudstone Limestone; fos. col. no. 47-HW-233 RMC - 102-47 RMC-101-47

1,341.55 1,342.21 P - 44 Mudstone, calcareous and phosphatic, calcareous mudatone RMC-100-47 1,368.49 P - 43 P - 42 Phosphate rock, argillaceous Phosphate rock, argillaceous, calcareous RMC- 99-47 RMC- 98-47 1 SO. 0 1,381.51 P - 41 P - 40 P - 39 Mudstone, calcareous, phosphatic Mudstone, phosphatic Phosphate rock, argillaceous RMC- 97-47 VEM- 327-47 VEM-326-47 7. S Z.5 1,400.86 1,410.62 1,423.66 P - 38 Phosphate rock, argillaceous, contains limestone lens at top VEM-325-47 1,442.26 Limestone lens between bed P-38 P - 37 P - 36 P - 3S and bed P-37 Mudstone, phosphatic, calcareous Mudstone, phosphatic, calcareous Phosphate rock, argillaceous, VEM -324-47 V EM -323-47 VEM -322-47 (0.0-1. I)

1,442.26 1,458.91 1,474.81 calcareous VEM -32 L-47 1,485.45 P - 34 Phosphate rocks foe. col. no. P - 33 P - 32 P - 31 P - 30 47-HW-232 Phosphate rock, argillaceous Phosphate rock Phosphate rock Limestone VEM-320-47 VEM-319-47 VEM -318-47 VEM-317-47 VEM-316-47 Z. S 1. S 1,528.81 1,342.01 1,566.65 1,597.97 1,602.29 Limestone lens, argillaceous, P - 29 phosphatic, in bed P-29 Limestone, argillaceous, VEM-313-47 (0.0-0.8) P - 28 P - 27 P - 26 phosphatic Mudstone, calcareous, phosphatic Limestone Phosphate rock, calcareous, VEM-314-47 VEM -313-47 VEM-312-47 MD . 1,610.37 1,636.29 1,638.27 argillaceous VEM -311-47 1,653.39 P - 23 P - 24 P - 22 P - 21 Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous Limestone, argillaceous; fos. col. no. 47-HW-224 RAW- 60-47 RAW- 59-47 RAW- 58-47 RAW- 49-47 RAW- 48-47 S.4 2,82 1,676.27 1,699.63 1,738.41 1,762.59 1,766.19

P - 20 P - 19 P - 18 P - 17 Phosphate rock Phosphate rock Limestone lens in bed P-18 Phosphate rock Phosphate rock, argillaceuus RAW- 47-47 RAW- 46-47 RAW- 45-47 RAW- 44-47 RAW- 43-47 (0.5) 2.S 1,795.44 1,855.71 1,908.11 1,947.38 P - 16 P - 15 P - 14 P - 13 P - 12 P - 11 P - 10 P - P - P - P - P S P - P - P - P Limestone, phosphatic Limestone Phosphate rock Phosphate rock, calcareous, fos. col. no. 47-HW-223 Limestone, phosphatic, fos. col. no. 47-HW-222 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock Illudstone, calcareous Limestone, argillaceous Mudatone, calcareous Phosphate rock, argillaceous Phosphate rock, fos. col. no. 47-11W-22.1 RAW- 42-47 RAW- 41-47 RAW- 40-47 RAW- 39-47 RAW- 38-47 RAW- 37-47 RAW- 36-37 RAW- 35-47 RAW- 34-47 RAW- 33-47 RAW- 32-47 RAW- 31-47 RAW- 30-47 RAW- 29-47 RAW- 28-47 RAW- 61-47 I . S 10. S 2.S 2. SS 201,7 1,955.39 1,956.99 1,997.34 2,025.62 2,041.37 2,073.97 2,109.61 2,148.01 2,183.65 2,201.71 2,245.11 2,249.67 2,250.71 2,252.32 2,268.32 Wells formation CyrCw1 Limestone, fos. col. no. 47-11W-220 Phosphate rock

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F CONDA, IDAHO. LOT NO. 1200. Phosphatic shale member of Phosphoria formation sampled in 300 level east crosscut of Conda mine, sec. 13, T. 8 S., R. 42 E., Caribou County, Idaho, on west limb of Trail syncline. Beds strike N. 10' W., and dip 55' E. Section measured by F. C. Armstrong, R. A. Hoppin, and L. E. Smith and sampled by IL A. Gulbrandsen, 0. A. Payne, R. S. Sears, and R. P. Sheldon in July 1947. Samples analyzed by Tennessee Valley Authority. Chemical anal ses percent Cumulative Thickness x Sample Thickness Bed as on percent P 05 thickness Rock description no. no. (feet) P205 A1203 Fe2O3 V-0 ignition insoluble (feet) (cumulatiNre) Rex member of Phosphoria formation R - Z. 70 " 4 Chert and mudstone R - 3 Limestone, cherty -' R - 2 Chert, calcareous R - 1 Mudstone, calcareous FCA-141-47 Phosphatic shale member of Phosphoria formation P -142 Phosphate rock, calcareboust fos. col. no. 47-HW-12s FCA-140-47 P -141 Mudstone, calcareous FCA-139-47 P -140 Mudstone, calcareous; fos. col. no. 47-11W-11 FCA-138-47 P -139 bludstone, calcareous FCA-137-47 S.6 P -138 biudstone, calcareous; fos. col. no. 47-11W-10 FCA-144-47

P -137 Limestone, argillaceous; fos. col. 47-HW-9 FCA-143-47 P -136 Phosphate rock, argillaceous FCA-142-47 S.1 P -135 Phosphate rock FCA-136-47 P -134 Itudstone, calcareous FCA-135-47 P -133 Phosphate rock. calcareous; fos. col. no. 47-HW-8 FCA-134-47 P -132 Phosphate rock FCA-133-37 P -131 Phosphate rock FCA-132-47 P -130 Phosphate rock FCA-131-47 Phosphate rock FCA-130-47 P -129 P -128 Phosphate rock, calcareous FCA-129-47 P -127 Phosphate rock FCA-128-47 P -126 Phosphate rock, calcareous near base FCA-127-47 P -125 Phosphate rock FCA -126-47 0.3S P -124 Limestone, phosphatic FCA-125-47 0.6S P -123 Phosphate rock, calcareous FCA-124-47 1 Fossil collection by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geo ogical Survey.

Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal ses (, :rcent) oss on A1203 Fe203 V-0 z 5 ignition insoluble Cumulative thickness (feet) Thickness x percent P05 (cumulatfire) P -122 P -121 P -120 P -119 P -118 Mudstone and phosphate rock Phosphate rock, calcareous Limestone, phosphatic Limestone, argillaceous Mudstone, calcareous FCA-123-47 FCA-122-47 FCA-121-47 FCA-120-47 FCA-119-47 P P P P P -11S Illudstone, calcareous Mudstone Limestone, argillaceous Mudstone Mudstone FCA-118-47 FCA-117-47 FCA-116-47 FCA-115-47 FCA-114-47 S0.4 ZS. 10 26. OS P -112 Limestone, phosphatic, argillaceous P -111 Mudstone, phosphatic, calcareous P -110 Limestone, phosphatic P -109 Limestone. phosphatic P -108 Limestone, phosphatic FCA-111-47 FCA-110-47 RAH-146-47 RAH-143-47 RAH-144-47 P -107 Limestone, phosphatic P -106 Phosphate rock, argillaceous, calcareous P -105 Limestone, argillaceous P -104 Mudstone, calcareous, phosphatic P -103 Mudstone, phosphatic, calcareous RAH-143-47 RAH-142-47 RAH-141-47 RAH-140-47 LES -243-47 1. S S.4 I. S P -102 Mudstone, calcareous P -101 Mudstone P -100 Phosphate rock, argillaceous, calcareous P - 99 Mudstone, calcareous P - 98 Mudstone, calcareous LES -242-47 LES -241-47 LES -240-47 LES -239-47 FCA-109-47 4. S S. 2 3S. 6 SI. 79 P - 97 Mudstone, calcareous, phosphatic P - 96 Mudstone, calcareous P - 9S Mudstone, calcareous P - 94 Limestone P - 93 Mudstone, calcareous FCA-108-47 FCA-107-47 FCA-106-47 FCA-105-47 FCA-104-47 . OIS SS9.30 P - 92 Mudstone, calcareous, phosphatic P - 91 Mudstone, phosphatic, calcareous P - 90 Mudstone calcareous , P - 89 Mudstone, calcareous P 811 Phosphate rock, argillaceous, calcareous FCA-103-47 FCA - 102-47 FCA-101-47 FCA-100-47 FCA- 99-47 1.1S S. 1 S. 9 3. S S3.4 P - 87 Mudstone P - 86 Phosphate rock, argillaceous, calcareous FCA- 98-47 FCA- 97-47 S. S SO. 9

P 85; Mudstone. calcareous FCA- 96-471 P 84 Phosphate rock, argillaceous. calcareous P - 83 Mudatone, calcareous P - 82 Mudstone P - 81 Limestone, argillacecrus LES -238-47 LES -237-47 LES -236-47 LES -235-47 0.3S P P - 79 P - 78 Mudstone, calcareous and phosphate rock; foe. col. no. 47-11W-7 Mudstone, calcareous Mudstone LES-234-47 LES -233-47 LES -232-47 S9.9 P - 77 P Phosphate rock, argillaceous; foe. col. no. 47-HW-6 Mudstone LES -231-47 LES -230-47 0.3S P - 75 Mudstone LES -229-47 P - 74 Mudstone LES -228-47 S.6 P - 73 P - 72 P Limestone, argillaceous Phosphate rock, argillaceous, calcareous Phosphate rock and mudstone LES -227-47 LES -226-47 LIES - 225-47 P P Mudstone, calcareous Mudstone, phosphatic, calcareous Mudstone, calcareous LES -224-47 LES -223-47 LES -222-47 S.9 P Limestone, phosphatic, argillaceous Mudatone, contains calcareous concretions near top LES -221-47 LES -226-47 P - 6S Mudstone LES -219-47 P - 64 P - 63 Mudstone, phosphatic, calcareous Mudstone, calcareous LES -218-47 LES -217-47 . OIS P - 62 Limestone, phosphatic, argillaceous P - 61 Mudstone, dolomitic LES -216-47 FCA- 95-47 1.0S 2.1S P - 60 Limestone, argillaceous, phosphatic P - 39 Limestone, argillaceous P - 58 Limestone, argillaceous P - 57 Limestone, argillaceous P - 56 Limestone, argillaceous FCA- 94-47 FCA- 93-47 FCA- 92-47 FCA- 91-47 FCA- 90-47 3.S P - SS Limestone, argillaceous - 54 Limestone, argillaceous P - S3 Dolomite, calcareous; foe. col. no. 47-HW-5 FCA- 89-47 FCA- 88-47 FCA- 87-47 3. S P - 52 P - SI Mudstone, calcareous liudatone, calcareous FCA- 86-47 FCA- 85-47

Chemical Cumulative Thickness z Bed Sample Thickness [­ Rock description Loss on Acid thickness percent P0s no. no. (feet) P205 Fe2O3 ignition insoluble (feet) (cumulatfIrei P - SO Mudstone, calcareous FCA- 84-47 P - 49 Mudstone, calcareous, phosphatic LES -215-47 P - 48 Limestone, argillaceous; fos. col. no. 47-HW -4 LES -214-47 P - 47 Mudstone, phosphatic, calcareous LES -213-47 8,2 1,002.29 P - 46 Mudstone, phosphatic LES -212-47 1,026.89 P - 45 Limestone LES -211-47 1,027.37 P - 44 Limestone, argillaceous LES -210-47 1,030.97 P - 43 Mudstone, phosphatic, calcareous LES -209-47 O. 7 1,039.09 P - 42 Mudstone, phosphatic, contains gypsum LES -208-47 1,045.26 P - 41 Phosphate rock LW -207-47 1,056.39 P - 40 Phosphate rock LES -206-47 1,090.49 P - 39 Mudstone, phosphatic LES -189-47 1,099.45 Possible shear zone, beds P-31 to P-38: rock structure largely destroyed; stratigraphic relations and thicknesses uncertain. P - 38 Mudstone, phosphatic LES -188-47 1,110.25 P - 37 Limestone, dolomitic, argillaceous LES -187-47 1,111.00 P - 36 Limestone, argillaceous, phosphatic LES -186-47 1,122.34 P 3S Mudstone, phosphatic LES -185-47 1,132.02 P - 34 Mudstone, calcareous LES -184...47 1,136.16 P 33 Limestone, argillaceous, phosphatic LES-183-47 7. S 1,152.32 P 32 Mudstone, phosphatic, calcareous LES -182-47 1,167.79 P 31 Phosphate rock, calcareous LES -181-47 1,189.63 P - 30 Phosphate rock, calcareous LES -180-47 1,195.91 P - 29 Phosphate rock, argillaceous FCA- 83-47 P - 28 Phosphate rock, calcareous FCA- 82-47 1,252.27 P - 27 Limestone FCA- 81-47 1,259.62 P - 26 Mudstone, phosphatic FCA- 80-47 1,270.60 P 25 Limestone, dolomitic FCA- 79-47 1,285.96 P - 24 Phosphate rock FCA- 78-47 1,351.71 P - 23 Phosphate rock FCA- 77-47 1,404.45 P 22 Phosphate rock, argillaceous, calcareous FCA- 76-47 1,447.20 P 21 Phosphate rock FCA- 75-47 1,488.64 P 20 Phosphate rock FCA- 74-47 1,527.06 P 19 Phosphate rocks fos. col. no. 47-HW -3 FCA- 73-47 27,7 1,571.38 P - 18 Limestone, phosphatic FCA- 72-47 1,592.77 P - 17 Phosphate rock, calcareous FCA- 71-47 1,641.80 P - 16 Dolomite, phosphatic FCA- 70-47 1,655.72

P - 15 Phosphate rock P - 14 Phosphate rock P - 13 Phosphate rock P - 12 Phosphate rock, argillaceous P - 11 Phosphate rock, argillaceous LES -205-47 LES -204-47 LES -203-47 LES -202-47 LES -201-47 O. S 1,698.38 1,725.74 1,745.82 1,7611.22 I, 776.14 P - 10 Phosphate rock P - 9 Phosphate rock P - 8 Limestone P - 7 Phosphate rock P - 6 Mudstone, calcareous LES -200-47 LES-199-47 LES -198-47 LES -197-47 LES -196-47 1,791.94 1,830.94 1,830.99 1,846.12 1,851.82 P - P - P - P - P - Limestone, argillaceous Mudstone, calcareous Mudstone, calcareous Mudstone, calcareous Phosphate rock; fos. col. no. 47-HW-2 LES-195-47 LES -194-47 LES -193-47 LES -192-47 LES -191-47 1,852.81 1,853.46 1,853.71 1,856.34 1,864.84 Wells formation Cw1 Limestone; fos. col. no. 47-NW-1 LES -190-47 f 0.7

SPECTROGRAPHIC ANALYSES—CONDA, IDAHO. LOT NO. 1200. Semi-quantitative analyses of samples of the Phosphoria formation, Conde, Idaho (see immediately preceeding pages for location of section, thickness and description of strata, and chemical analyses of samples), made by U. S. Bureau of Mines Laboratory, Albany. Oregon. In addition to the elements listed in the table below, Sb, As, Be, Bi, Cd, Co, Ga, Au, Li, Mg, Pt, Ta, Sn, and W were looked for in all samples but were not detected. Explanation of symbols A more than 10 percent B 5-10 percent C 1-5 percent E 0.01-0.1 percent F 0.001-0.01 percent G less than 0.001 percent ND not detected Bed Sample no. Al Eta B Ca Cr Cb Cu Fe Pb Mg Mn Mo Ni Si Ag Na Sr Ti Zn Zr FCA-141-47 ND E E ND G ND D E F E A NDEINDE END F P -142 P -141 P -140 FCA-140-47 FCA-139-47 FCA-139-47 FCA-137-47 ND ND ND ND F E E E A E E E E ND ND ND ND G G G G D ND ND ND ND D D D D E E E E F F F F E E E E ND E E E D E F A GDEEIEDE A NDDNDE1DNDF ANDENDE;EEF Beds P-138 through P-136 not analyzed. EC GDEEDEF P -135 FCA-136-47 CNDF A ENDGDNDDEF F P -134 FCA-135-47 ND E E ND G ND D E E E A G D E D D D F F D G E E F E E F E' FCA-134-47 D ND F A E ND G D ND D F E F E E F P -132 FCA-133-47 D ND F A E ND G D ND D F F F D G E P -131 FCA-132.-47 E F A D ND G ND D F E E B G E E E D D F G E E E E E F FCA-131-47 DEF A E ND G ND D F F F E E E E F F F E B G E P -129 FCA-130-47 CFI? A E ND G ND D FCGEF,EENDF P -128 FCA-129-47 CLF A E ND G ND D F F ECGEE1EDEF P -127 FCA-128-47 E F A E ND G ND D F F P -126 FCA-127-47 CEF A ENDGCNDDFFECGEEiEDEF P -125 ENDGCNDDFFECGEE!EDEF FCA-I26-47 MIA EiFIE END F P -124 FCA-125-47 E F A E ND G D ND F F F E CGE, EEEEF P -123 FCA-124-47 E F A E ND G D ND D F F ES AGEIE I EDDE P -122 FCA-123-47 E E A E E G ND D F EICGDNDDFEEEIGEEHDEF P -121 FCA-122-47 E F A FCGEIEEENDF P -120 FCA-121-47 D E F A E ND G D ND F F EGCNDCEEEAGDEIEDEF P -119 FCA-120-47 Er A E AGDF,EDEF F E E P -118 FCA-119-47 E E B E E G ND D GDF1EDDF P -117 FCA-118-47 E E E E G ND D F E E A EE A GDFIEDECF P -116 FCA-117-47 CEECEEGCNDDF E E A GDF1EDEE P E ND D E FCA-116-47 E E E G

666661Pitntiorq G D F E D E E E G ND C E E E A E P -114 FCA-11S-47 E E A G D F E D E E ND C E E E E G P -113 FCA-114-47 E E E E E B G D E E D E F F A E E G P -112 PiC A -111-47 E E A G D E E D E F E E G ND D E P -111 FCA-110-47 F B ND E E F D ND F F F C E ND G D ND D E P -110 RAH-146-47 F A E E E B ND E E E D E F A E ND G D ND D P -109 RAH-145-47 F E B G E E E D E F A E ND G D ND D E E P -108 RAH-144-47 F G E E E D E F ND D E F E B ND G D P -107 RAH-143-47 F A E G D E E E E F E A ND G ND D E F P -106 RAH-142-47 B B E G D E E ND F F ND G ND C E F E A P -105 RAH-141-47 F A E F E 1 A G D E E E E F E ND G ND D P -104 RAH-140-47 C ND E A Beds P -103 through P -99 not analyzed. F E A G D F E E ND E E ND G E D E P - 98 FCA-109-47 E F D E E E E F F E B G P - 97 FCA-108-47 E F E ND D ND D F G D E E E E F B E ND G ND D E F E A P - 96 FCA-107-47 E F E E E F ND D E F E A G D E P - 9S FCA-106-47 E F E ND D F E E ND F ND G D ND C F F E P - 94 FCA-105-47 E F B B E E E ND F E A G D E ND ND D E F P - 93 FCA-104-47 E F D E E E E F ND D E F E A G P - 92 FCA-103-47 E F E ND G G D E E E E F ND D E F E A P - 91 FCA-102-47 E F B E ND G G D E F. E ND F ND ND D E F E A P - 90 FCA-101-47 E F E G E A G D E E E F D E F P - 89 FCA-100-47 E F B E . ND G ND D E E It E F E A G ND D E F P - 88 FCA- 99-47 E F B E ND G E E E E E F ND D E F E A G P - 87 FCA- 98-47 E F B ND G E D E F G E E G D ND D E F E B P - 86 FCA- 97-47 E F B ND E E E E F - as ND G ND D E F E A G D P FCA- 96-47 E F E E F E B G E E E E E F ND D P - 84 LES -238-47 F B E ND G E F E A G D F E B ND F ND D P - 83 LES -237-47 E F E ND G G D F E E ND E ND C E F E A P LES -236-47 E F E ND a G E F E E ND F ND G ND C E F E B P - 81 LES -23S-47 E F E B G E /3 E ND F P - 80 LES -234-47 B F B E E F E ND ND D D F E E ND E P - 79 LES-233-47 E F B ND G ND D E F D F E E ND F E A G ND D E F E A G P - 78 LES -232-47 E F D ND ND E B E D ND F F E B G P - 77 LES -231-47 E F B E ND G ND D E B ND E G It F E ND D E F E A P LES -230-47 E F Z ND D E ND E A G D F P - 75 LES -229-47 E F B ND G ND D E F E A G D F D E ND E ND D E F E P - 74 LIS -228-47 a F E ND F E E ND E E A G D P - 73 E ND G ND C E F LES -227-47 E F B D F E E ND F E B G P - 72 B E ND a ND D F F LES -226-47 E F E F E ND F ND D F F E B G LES -225-47 E F B B ND a D F E E ND E ND D E F E B G P - 70 LES -224-47 E F F ND a G D E 1E D ND E P - 69 LZ/1-223-47 E F B E ND ND D B F E B :LS

Bed Cu Fe Pb Mg Mn lido Ni Si Ag Na Sr Ti Zia Zr Sample no. Al Ba B Ca Cr Cb DO. E A GDF DENDE ENDGCNDDEF P- 60 LES-222-47 F E CNDD F E ENDF ENDG DNDD E P- 67 LES-221-47 E F E A ND D ND E END E F ND G ND D P - 66 LES-220-47 D E F E A ND D ND E END E F ND G ND P - 65 LW -219-47 D F F E B ND D ND E E ND F ENDO D ND P - 64 LES -218-47 D F EE EE P - 63 LES -217-47 E ND G ND D E F E A G E ND G D ND D E F E G D F E E E F P - 62 LES -216-47 G D E E E E F E ND G ND D E F E A P - 61 FCA- 95-47 E E F ND D E F E A G D E E E ND G P - 60 FCA- 94-47 ND D E F F. 13GDE F. E ND F E ND G D E A G E E E E E F P-59 FCA- 93-47 P- S8 FCA- 92-47 D ND G ND D E F E E A G E E E D E F ND D E P-57 FCA- 91-47 D ND G S BUD E E E ND F P - 56 INCA- 90-47 E ND G ND D E F E G E E E E E F ND D E F P- SS FCA- 89-47 E ND G E A (IDE E E ND F ND D E F F E G E F E E ND F P - 54 FCA- 88-47 E ND G ND G D ND E P - 53 FCA - 87-47 E F E A G D F E E ND F ND D E P- 52 FCA - 46-47 E ND G F E A G D F E E ND F P - S1 FCA - 8S-47 E ND G ND D E E F E A E F E E ND E P - 50 FCA- 84-47 E ND G D ND D E F E A G D F E F. E F P - 49 LES -215-47 E ND G ND D E F El B ND E ND E E ND F P - 48 LES -214-47 E ND G D ND E F E E E F P - 47 LES-213-47 E ND G ND D F F E A G D F BEEF P - 46 LES-212-47 E ND G ND D F F E A G ND D F E END F P-45 LES -211-47 F ND G D ND E F F ND D ND E E ND F P-44 LES-210-47 F ND() DNDC F F F E E E F P - 43 LES-209-47 E NDGCNDDF F E A G E F E G E F BEEF P - 42 LES -208-47 E ND G ND D F F E E E D E F P - 41 LES -207-47 B ND G ND D F F E B G F ESC, E F BEND I, P - 40 LES -206-47 ENDGCNDDF D E E F Er P- 39 LES -189-47 ND G D ND D F F E G F A G D ND E F F F P- 38 LES -188-47 DNDCIDNDDF ECG E ND E F Er P - 37 LES -187-47 E ND G D ND E F B G E ND E F E F F E F ECG E ND E F F F P - 36 LES -186-47 ENDGEINDCF P - 35 LES -185-47 1INDGDNDDF E B G D ND E F E F P- 34 LES -184-47 IIINDGDNDDF F E B G E ND E F E F P- 33 LES -183-47 E ND G D ND D F F ND D F E F P - 32 LES -182-47 ENDGCNIDDEF I! A G D F ECG E ND E F E F P - 31 LES -181-47 E ND G D ND D F G D E D E E F P- 30 LES -180-47 DNDGCNDDF1F E B P - 29 FCA- 83-47 ENDGCNDDF;F E B G E E D E F P - 28 FCA- 82-47 D INDGCNDDEIF KCGEEEDEF UM UUM 04 44401 4 UUCIOUUM UMM UUUUU M U UUU UUUM U UM 404 WIimikii.W WWWWW WWWWW WWWWW WWWW WWWWWW WWWWW WW WWW W g2g22Ing ram W WWWW W WWWWW WWWW W WW WW W WWW22 NUMMI

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DIAMOND DRILL HOLE 6, SLUG CREEK VALLEY, IDAHO. LOT NO. 1277. Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 6 on west slope of hill above Slug Creek Valley, sec. 30, T. 8 S., R. 44 E., Caribou County, Idaho, on west limb of Schmid syncline. Beds strike north and dip 8' E. Hole drilled in September 1948 by U. S. Bureau of Mines, A. E. Long in charge, and core measured and sampled by D. F. Davidson. Samples analyzed by U. S. Bureau of Mines, Albany, Oregon. Chemical analyses Cumulative Thickness x Bed Sample Thickness rcent Rock description thickness no. no. (feet) ci (feet) percent P (cumulative, P2O5 insoluble Phosphatic shale member of Phosphoria formation-lower beds only P-32 Phosphate rock, argillaceous DFD-1111 P-31 Phosphate rock, argillaceous DFD-1112 P-30 Phosphate rock, argillaceous DFD-I113 P-29 Phosphate rock DFD-1114 P-28 Mudstone, phosphatic, calcareous DFD-1115 P-27 Limestone DFD-1116 P-26 Limestone DFD-1117 P-25 Phosphate rock, argillaceous DFD-1118 ZZ. 3 P-24 Limestone DFD-1119 P-23 Limestone, argillaceous, phosphatic DFD-1120 P-22 Mudstone, phosphatic

DFD-1121 P-21 Limestone, argillaceous DFD-1122 P-20 Limestone, argillaceous DFD-1123 P-19 Limestone DFD-1124 P-18 Phosphate rock DFD-1125 P-17 Phosphate rock DFD-1126 P-16 Phosphate rock DFD-1127 P-15 Phosphate rock, argillaceous DFD-1128 P-14 Limestone, argillaceous DFD-1129 P-13 Phosphate rock, calcareous DFD-1130 P-12 Phosphate rock DFD-1131 22,8 P-11 Phosphate rock, argillaceous DFD-1132 22,7 P-10 Limestone, phosphatic DFD-1133 P- 9 Limestone, phosphatic DFD-1134 P- 8 Phosphate rock DFD-1135 P- 7 Phosphate rock DFD-1136 P- 6 Phosphate rock DFD-1137 P- 5 Phosphate rock DFD-1138 P- 4 Mudstone DFD-1139 P- 3 Limestone, argillaceous DFD-1140 P- 2 Mudstone, calcareous DFD-1141 P- 1 Phosphate rock DFD-1142

Wells formation DFD-1143 Cw-1 Limestone ' $ '

"ktiFtf,61111t4 7.3144.4.11'

DIAMOND DRILL HOLE 3, MIDDLE SULPHUR CANYON, IDAHO. LOT NO. 1274. Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 3 on south slope of Middle Sulphur Canyon, sec. 8, T. 9 S., R. 43 E., Caribou County, Idaho, on west limb of Trail Creek syncline. Beds strike north-northwest and dip 15° E. Hole drilled in September 1948 by U. S. Bureau of Mines, A. E. Long in charge, and core measured and sampled by D. F. Davidson. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical analyses Cumulative Thickness z Bed Sample Thickness ercent k d ti thickness percent P 0 Rocescripon no. no. (feet) (feet) (cumulative/ P205 insoluble Phosphatic shale member of Phosphoria formation-partial section P-25 Mudstone DFD-961 P-24 Mudstone DFD-962 P-23 Mudstone DFD-963 P-22 Mudstone DFD-964 P-21 Mudstone DFD-965 P-20 Mudstone, phosphatic DFD-966 P-19 Mudstone, phosphatic DFD-967 P-18 Phosphate rock, argillaceous DFD-968 P-17 Phosphate rock, argillaceous DFD-969 P-16 Phosphate rock, calcareous DFD-970 Z. 1 P-15 Phosphate rock DFD-971

P-14 Phosphate rock and mudstone DFD-972 P-13 Phosphate rock and mudstone DFD-973 P-12 Phosphate rock, argillaceous DFD-974 P-11 Mudstone, phosphatic DFD-975 P-I0 Phosphate rock, argillaceous DFD- 976 P- 9 Phosphate rock DFD-977 P- 8 Phosphate rock, argillaceous DFD-978 P- 7 Mudstone, phosphatic DFD-979 Core missing P- 6 Phosphate rock, argillaceous DFD-980 66.00* P- 5 Phosphate rock DFD-981 Z. 7 P- 4 Phosphate rock, argillaceous DFD-982 P- 3 Phosphate rock, argillaceous DFD-983 P- 2 Phosphate rock, argillaceous DFD-984 220.73** Core missing P- 1 Phosphate rock DFD-985 38.88* Cumulative data incomplete due to missing information. Computations start from zero after interruption. Note incompleteness of cumulative data.

DIAMOND DRILL HOLE 4, MIDDLE SULPHUR CANYON, IDAHO. LOT NO. 1275. Phosphatic shale member of Phosphoria formation cored in diamond drill hole 4 on north slope of Middle Sulphur Canyon, sec. 8, T. 9 S., R. 43 E., Caribou County, Idaho, on west limb of Trail Creek syncline. Beds strike north-northwest and dip 22' E. Hole drilled in September 1948 by U. S. Bureau of Mines, A. E. Long in charge. Partial section measured and sampled by D. F. Davidson. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical analyses Cumulative Thickness x Bed Sample Thickness (.ercent) Rock description thickness percent P 05 no. no. (feet) ci (feet) (cumulative, P205 insoluble Phosphatic shale member of Phosphoria formation-basal beds only P- 8 Phosphate rock DFD-986 P- 7 Phosphate rock DFD-987 P- 6 Phosphate rock, argillaceous DFD-988 P5 Phosphate rock, argillaceous DFD-989 P- 4 Phosphate rock DFD-990 P3 Mudstone DFD-991 P- 2 Mudstone DFD-992 PI Mudstone, phosphatic DFD-993 Wells formation Cw-1 I Limestone DFD-994

NORTH DAIRY, IDAHO. LOT NO. 1212. Upper part of phosphatic shale member of Phosphoria formation sampled in bulldozer trench near north end of Dairy syncline, NEINEI sec. 20, T. 9 S., R. 44 E., Caribou County, Idaho. The stratigraphic sequence of the units is questionable for, because of a large number of faults, some beds may be omitted or repeated. No cumulative totals are given for this reason. Section measured by R. M. Campbell and L. E. Smith and sampled by R. S. Sears, R. P. Sheldon, and R. A. Smart in August and September 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical analyses (percent) Bed Sample Thickness Rock description Loss on Acid no. no. (feet) Al2O3 Fe2O3 P205 ignition insoluble Rex member of Phosphoria formation-basal bed only R- 1 Chert LES-400-47 t. 2 Phosphatic shale member of Phosphoria formation-upper part only P-61 Phosphate rock LES-399-47 P-60 Mudstone LES-398-47 P-59 Mudstone LES-397-47 P-58 Mudstone LES-396-47 P-57 Mudstone LES-395-47 P-56 Mudstone LES-394-47 P-55 Mudstone LES-393-47 P-54 Mudstone LES-392-47 P-53 Mudstone LES-391-47 P-52 Phosphate rock, argillaceous LES-390-47 P-51 Mudstone LES-389-47 P-50 Mudstone LES-388-47 Several beds may be missing in fault zone between LES-388-47 and RMC-50-47. P-49 RMC- 50-47 P-48 RMC- 49-47 59,2 Phosphate rock Mudstone and phosphatic mudstone P-47 Phosphate rock and mudstone RMC- 48-47 P-46 RMC- 47-47 Mudstone P-45 Phosphate rock RMC- 46-47 P-44 Phosphate rock, argillaceous MAC- 45-47 P-43 Phosphate rock RMC- 44-47 P-42 Mudstone, phosphatic RMC- 43-47 P-41 Phosphate rock RMC- 42-47 P-40 Phosphate rock, argillaceous RMC- 41-47 P-39 Phosphate rock RMC- 40-47

Chemical anal ses ercent Sample Thickness oss on ci Bed P205 ignition insoluble no. Rock description no. (feet) Al03 Fe2O3 P-38 P-37 P-36 P-35 P-34 Phosphate rock and phosphatic mudstone Mudstone Mudstone, phosphatic Phosphate rock, argillaceous Mudstone, phosphatic RMC- 39-47 RMC- 38-47 RMC- 37-47 RMC- 36-47 RMC- 35-47 P-33 P-32 P-31 P-30 P-29 Mudstone, calcareous and phosphate rock Mudstone Mudstone, phosphatic, calcareous Phosphate rock and phosphatic mudstone Phosphate rock and phosphatic mudstone RMC- 34-47 RMC- 33-47 RMC- 32-47 RMC- 31-47 RMC- 30-47 P-28 P-27 P-26 P-25 P-24 Phosphate rock Phosphate rock, contains chert lens Phosphate rock and argillaceous phosphate rock Phosphate rock and argillaceous phosphate rock Phosphate rock and argillaceous phosphate rock RMC- 29-47 RMC- 28-47 RMC- 27-47 RMC- 26-47 RMC- 25-47 P-23 P-22 Phosphate rock Phosphate rock

RMC- 24-47 RMC- 23-47 Fault zone, correlation not positive. P-21 P-20 P-19 P-18 P-17 Mudstone Phosphate rock and mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic LES-387-47 Sample lost LES-385-47 LES-384-47 LES-383-47 P-16 P-15 P-14 P-13 P-12 Mudstone, phosphatic Phosphate rock, argillaceous Mudstone, phosphatic Mudstone and phosphate rock Mudstone, phosphatic LES-382-47 LES-381-47 LES-380-47 LES-379-47 LES-378-47 P-11 P-10 P- 9 P- 8 P- 7 Mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone Mudstone LES-377-47 LES-376-47 LES-375-47 LES-374-47 LES-373-47 P- 6 P- 5 P- 4 Mudstone Mudstone Mudstone, phosphatic LES-372-47 LES-371-47 LES-370-47

P- 3 Mudstone, chert, and phosphate rock Sample lost P- 2 Mudstone, contains chert nodules LES-368-4? P- 1 Mudstone. contains chert nodules LES-367-47

SWAN LAKE GULCH, IDAHO. LOT NO. 1265. Phosphatic shale member and part of Rex member of Phosphoria formation sampled in bulldozer trench in Swan Lake gulch, NE SW; sec. 29, T. 9 S-, R. 43 E., Caribou County, Idaho, on west limb of faulted and contorted syncline. Beds of Rex member strike N. 46* W. and dip 54a E. Section measured by F. W. 0' Malley, R. P. Sheldon, and R. G. Waring and sampled by Waring and H. A. Larsen in September 1948. Samples analysed by U S. Bureau of Mines Laboratory, Albany, Oregon. Bed Chemical anal ses (ercent) Cumulative Thickness x Sample Thickness flo. Rock description oss on ci thickness percent P705 no. (feet) P 0 Al 0 Fe 03 ignition insoluble (feet) (cumulatrivel Rex member of Phosphoria formation-basal beds only It- 8 Che WOM-3011 Lim stone, argillaceous WOM-3020 R- 7 11- 6 Che , calcareous WOM -3019 RChe . calcareous and limestone WOM-3018 R- 4 Lim stone, argillaceous WOM-3017 R- 3 Che R- 2 WOM-3016 Che t, calcareous WOM-3015 R- 1 Che t, calcareous WOM -3014 Phosphatic shale member of Phosphoria formation P-97 Ph sphate rock, argillaceous, calcareous; s. col. no. 48-JES-2431 WOM -3013

P-96 M P..95 Mu stone, calcareous WOM-3012 stone, calcareous RGW- 3010 P-94 Mu

P-93 tone; fos. col. no. 48-JES-242 ROW- 3009 Mu stone, calcareous; fos. col. no. 4 -JES -241 RGW- 3008 Mu stone, calcareous; fos. col. no. 4 -JES-240 RGW- 3007 P P 90 Li estone RGW- 3006 Mu tone, calcareous; fos. col. no. P-89 -JES-239 RGW- 3005 Mu stone, calcareous; fos. col. no.

P.88 -JES-238 RGW- 3004 Mu stone RGW- 3003 P-87 Mu. stone, phosphatic RGW- 3002 P-85 Li estone, phosphatic RGW- 3001 Li estone, argillaceous RPS- 2850 P-83 Ph sphate rock RPS- 2849 Phosphate rock, argillaceous, calcareous RPS- 2848 P-82 Mu stone, phosphatic; fos. col. no. 48-JES-237 WOM-3000

P-81 Mudstone, calcareous, phosphatic; fos. col. no. 48-JES-236 P-80 Phosphate rock, calcareous Limestone concretion P-79 Phosphate rock, calcareous P-78 Limestone, phosphatic; fos. col. no. 48-JES-235 P-77 Limestone, phosphatic; fos. col. no. 48-JES- 234 P-76 Phosphate rock, calcareous, argillaceous; fos. col. no. 48-JES-233 Limestone concretion P-75 Mudstone, phosphatic; fos. col. no. 48-JES-232 P-74 Mudstone P-73 Mudstone and argillaceous phosphate rock P-72 Mudstone; fos. col. no. 48-JES-231 P-71 Mudstone, phosphatic P-70 Mudstone P-69 Phosphate rock, argillaceous P-68 Mudstone P-67 Mudstone, phosphatic P-66 Mudstone P-65 Mudstone P-64 Phosphate rock P-63 Mudstone; fos. col. no. 48-JES-230 P-62 Phosphate rock, argillaceous P-61 Mudstone P-60 Phosphate rock, argillaceous and inudstone P-59 Mudstone P-58 Mudstone, phosphatic P-S7 Mudstone P- 56 Mudstone, phosphatic P-55 Mudstone P-54 Mudstone; fos. col. no. 48- JES -229 P-53 Phosphate rock, argillaceous P-52 Mudstone P-51 Mudstone P-50 Mudstone P-49 Mudstone; fos. col. no. 48-JES-228 P-48 Mudstone WOM-2999 WOM-2998 WOM-2973 WOM-2997 WOM-2996 WOM-2995 RPS- 2847 RPS- 2846 RPS- 2845 RPS- 2844 RPS- 2843 RPS- 2842 RPS- 2841 RPS- 2840 RPS- 2839 RPS- 2838 WOM - 2994 WOM -2993 WOM-2992 WOM -2991 WOM -2990 WOM-2989 WOM-2.988 WOM -2987 WOM-2986 WOM -2985 WOM-2984 WOM- 2983 WOM-2982 WOM-2981 WOM-2980 WOM-2979 WOM - 2978 WOM-2977 WOM-2976 WOM-2975 (0.4) (0.5) Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Fossil collection made by J. E.

Chemical anal ses percent Cumulative Thickness x Bed Sample Thickness thickness percent P2e, (cumulative oss on Rock description (feet) P205 A1203 no. ignition insoluble (feet) no.

.0. 1.-0 0 WOM -2974 Mudstone WOM-2972 Phosphate rock, argillaceous WOM-2971 Mudstone; fos. col. no. 48-JES-227 Mudstone, phosphatic WOM-2970 In ...4 0001 -.e1 WOM-2969 Mudstone; fos. col. no. 48-JES-226 t.cp.inelc is. toNtil N IN COgr CO ts coo a 111 4) ..0 0 0 WOM -2968 WOM-2.967 Phosphate rock, argillaceous Phosphate rock Mudstone WOM-2966 Mudstone WOM-2965 -38 Mudstone; fos. col. no. 48-JES-225 WOM -2964 Mudstone WOM-2963 ercseso-.00N1 .-.0 0 .-. 0 .-.01 04 011 .-.N NIN O N.. O .. ..0 eg, Phosphate rock, argillaceous WOM-2962 Mudstone WOM-2961 Phosphate rock, argillaceous WOM-2960 WOM-2959 Mudstone; fos. col. no. 48-JES-224 Phosphate WOM-2958 rock and mudstone -3/ WOM-2957 Mudstone; fos. col. no. 48-JES-223 WOM-2956 WOM -2955 Mudstone, phosphatic, calcareous Mudstone Mudstone WOM -2954 Mudstone WOM-2953

Mudstone WOM-2952 -24 Phosphate rock, argillaceous. calcareous WOM -2951 Mudstone. calcareous

WOM-2950 -23 Mudstone, phosphatic, calcareous WOM -2949 1,037.86 1,045.84 1,115.26 1,132.66 1,138.26 - _Phosphate rock, calcareous, argillaceous WOM-2948 Mudstone, phosphatic WOM -2947 Phosphate rock WOM-2946 WOM-2945 WOM-2.944 Phosphate rock, argillaceous Limestone 1,165.86 M ... .r ce 0 N el0 el el WOM-2943 Mudstone, phosphatic, calcareous Limestone, argillaceous WOM-2942.

1,169.01 1,173. '.:.") 1,247.93 1,266.93 25: 11 01: 870 87.. 2740 WOM-2941 Limestone, phosphatic, argillaceous WOM-2940 Phosphate rock, argillaceous Phosphate rock, argillaceous WOM-2939 1,281.87

21.35 2.6 Phosphate rod?, argillaceous WOM-2938 Phosphate rock

1,317.75 Wom-2937 1,343.35

235: 06 Phosphate rock, argillaceous WOM-2936 WOM-2935 1,344.25 Mudstone; fos. col. no. 48-JES-222 - 8 Phosphate rock, argillaceous; fos. col. no. 48-JES-221 WOM-2934

P- 7 P- 6 P- 5 P- 4 P- 3 Phosphate rock, argillaceous; fos. col. no. 48-JES-220 Phosphate rock Phosphate rock Phosphate rock; fos. col. no. 48-JES-219 Mudstone, calcareous, phosphatic WOM-2933 WOM-2932 WOM-2931 WOM-2890 WOM- 2889 1,398.34 1,461.04 1,582.36 P- 2 P- 1 Mudstone Phosphate rock WOM -2874 WOM -2873 1,635.72 1,642.28 Wells formatio Cw-1 I Limestone; fos. col. no. 48-JES-218 WOM-2872

DEER CREEK, IDAHO. LOT NO. 1268. Phosphatic shale member of Phosphoria formation sampled in Trench I (hand trench) on north side of Deer Creek, SISW1 sec. 34, Unsampled part of section T. 9 S., B. 45 E., Bannock County, Idaho. Section measured and partially sampled by C. F. Deiss in 1944. remeasured by R. P. Sheldon and sampled by R. G. Waring in 1948. All I series samples analyzed by Tennessee Valley Authority. All RPS series samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical analyses Bed Sample Thickness rcent Rock description no. (feet) P2O5Acid no.

u insoluble Phosphatic shale member of Phosphoria formation P-82 Phosphate rock, calcareous RPS-2837 P-81 Mudstone. calcareous RPS-2836 P-80 Mudstone, phosphatic RPS-2835 P-79 Mudstone, calcareous RPS-2834 P-78 Mudstone, calcareous RPS -2833 P-77 Mudstone, calcareous RPS-2832 P-76 Mudstone, calcareous RPS-2831 P-75 Limestone RPS-2830 P-73 Mudstone RPS-2829 P-74 Mudstone and phosphate rock P-72 Phosphate rock RPS-2828 P-71 RPS-2827 Mudstone, calcareous RPS-2827 through RPS-2.837 equivalent to Deiss' unit nos. 69 through 73. P-70 Phosphate rock P-69 Phosphate rock P-68 Mudstone, phosphatic P-66 Phosphate rock and mudstone P-67 Limestone P-65 Phosphate rock P-64 Phosphate rock and mudstone P-63 Phosphate rock P-62 Phosphate rock P-61 Phosphate rock, contains limestone nodules P-60 Phosphate rock P-59 Phosphate rock, contains limestone nodules P-58 Limestone, argillaceous P-57 Phosphate rock and mudstone P-56 Mudstone, phosphatic P-SS Phosphate rock P-54 Mudstone P-53 Phosphate rock, argillaceous Cumulative thickness (feet) Thickness x percent P,05 (cumulatrifitei 50. 14*

P-52 P-51 Mudstone, phosphatic Limestone RPS-2826 RPS-2826 equivalent to Deiss' unit no. 49. P-50 Mudstone, calcareous P-49 Mudstone, phosphate rock, and limestone P-48 Mudstone P-47 Mudstone P-46 Mudstone P-45 Phosphate rock and mudstone P-44 Phosphate rock and mudstone P-43 Mudstone P-42 Phosphate rock and mudstone P-41 Mudstone and phosphate rock P-40 Limestone and mudstone, phosphatic P-39 Limestone P-38 Mudstone, limestone, and phosphate rock P-37 Mudstone, phosphate rock, and limestone P-36 Mudstone, phosphatic and limestone P-35 Limestone RPS-2825 RPS-2825 equivalent to Deiss' unit no. 33. P-34 Mudstone, calcareous P-33 Mudstone, phosphatic Z.0 P-32 Limestone RPS-2824 RPS-2824 equivalent to Deiss' unit no. 30. P-31 P-30 P-29 10 Mudstone Limestone Mudstone Limestone concretion RPS-2823 (0.6) RPS-2823 equivalent to Deiss' unit no. 26. Concretion occurs between Deiss-25 and Deiss-27. Limestone concretion RPS-2822 (1.1) RPS-2822 occurs within Deiss' unit no. 25. 1 The full section was measured but only part of the section was sampled by Deiss. The I series sample data here listed are taken from table 9, p. 91 of Deiss' report. The beds not sampled by Deiss are included in the columnar section for Trench I (as shown on plates 6 and 7 of Deiss' report) and are there identified by unit numbers which do not correspond to the sample numbers of table 9. The beds sampled by Sheldon (RPS series) are correlated with the unit numbers of Deiss. Cumulative data incomplete due to missing information. Computations start from zero after interruption.

Chemical analyses Bed Sample Thickness rcent Rock description no. (feet) no. P-28 Mudstone P-27 Mudstone, phosphatic and limestone RPS-2821 P-26 Limestone RPS-282.1 equivalent to Deiss' unit no. 23. P-25 Phosphate rock, argillaceous and limestone Limestone concretion? RPS-2819 (1.2) RPS-2819 equivalent to Deiss' unit no. 21 and occurs between RPS-2820 and Deiss-22. Phosphate rock and calcareous mudstone P-24 RPS-2820 P-23 Mudstone, phosphatic and limestone P-22 Limestone RPS-2818 RPS-2818 equivalent to Deiss' unit no. 19. P-21 Mudstone, phosphatic P-20 Phosphate rock, calcareous, argillaceous P-19 Phosphate rock, calcareous P-18 Phosphate rock and mudstone P-17 Phosphate rock and mudstone P-16 Limestone, argillaceous P-15 Mudstone, calcareous, phosphatic P-14 Limestone, argillaceous RPS-2812 RPS-2812 equivalent to Deiss' unit no. 11. P-13 Phosphate rock and mudstone P-12 Phosphate rock, mudstone, and limestone P-11 Phosphate rock and mudstone Limestone concretion RPS-2811 (0.6) RPS-2811 concretion occurs within RPS-2810. P-10 Phosphate rock and calcareous mudstone RPS-2810 P- 9 Limestone R PS-2809 RPS-2809 and RPS-2810 equivalent to Deiss' unit no. 7. P- 8 Phosphate rock, argillaceous P- 7 Limestone RPS-2808 RPS-2808 equivalent to Deiss' unit no. 5. PPhosphate rock Cumulative thickness (feet) Thickness x percent P,05 (cumulatftre) 508. /3 1,003.05

1,105.77 1,155.27 1, 157. 88 1, 158.93 1, 174. RPS-2807 RPS -2806 Wells formation Cw,- 5 Limestone RPS-2.817 Cw-4 Phosphate rock RPS-2816 Cw-3 Limestone RPS-2815 Cw-2 Phosphate rock RPS-2814 Cw-1 Limestone RPS-2813 ZZ. 16 Note incompleteness of cumulative data. P- 5 Phosphate rock P- 4 Phosphate rock P- 3 Mudstone P- 2 Limestone, argillaceous P- 1 Phosphate rock

UNITED STATES VbEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN IDAHO Second Idaho Report by V. E. McKelvey, R. A. Hoppin, F. C. Armstrong, R. A. Gulbrandsen, L. E. Smith, and R. M. Campbell MINERAL DEPOSITS BRANCH Spokane, Washington August 1951 OPEN FILE

This report is preliminary and has not been edited or reviewed for conformity with U. S. Geological Survey standards and nomenclature.

TABLE OF CONTENTS Page Introduction Abstract of sections North Wooley Range. Lot no. 1230 Spectrographic analyses North Rasmussen Valley. Lot no. 1233. Spectrographic analyses South Rasmussen Valley. Lot no. 1232. Spectrographic analyses , Trail Canyon. Lot no. 1206. Spectrographic analyses Johnson Creek. Lot no. 1209. Spectrographic analyses. South Dry Valley. Lot no. 1211. West Dairy. Lot no. 1208. Montpelier Canyon. Lot nos. 1207 and 1236. .. Spectrographic analyses

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN IDAHO Second Idaho Report by V. E. McKelvey, R. A. Hoppin, F. C. Armstrong, R. A. Gulbrandsen, L. E. Smith, and R. M. Campbell INTRODUCTION f The . first of a series of reports giving detailed stratigraphic sections of the Phosphoria borniat. e ion in the Western phosphate field as measured and described by the Geological Survey will as Circulars within the next few months. Because of the needs of industry for many of these cati e data during the 1951 field season, and in view of the unavoidable delays attendant on publi­ °n, the tabular data to be included in these Circulars are hereby placed on open file in simple Jproduction form (prepared by Ozalid from photographic negatives) and without explanatory text SO that immediate use may be made of the data. The first four sets of tables, one each for the states of Montana, Idaho, Wyoming, and Utah, were released but of eased on open file on August 15, 1951. This report includes data of the same character includ samples from different localities and is the second report on samples from Idaho. The tables for e name and location of section measured, brief description of geologic setting, acknowledgments eld t1kand analytical work, abstract data on the sections (bed number, rock name, sample number, and H acid le thickness), and analytical data on the samples. The analytical data include reports on P205 and and insoluble for all samples and additional analyses, such as A1202, Fe2O3, loss on ignition, F, ciud295, for selected samples. Spectrographic analyses for a large number of elements are inu for samples from selected localities* D. C., These , reports are placed on open file at the offices of the Geological Survey in Washington, the id hPokane, Washington, Salt Lake City, Utah, and Montpelier, Idaho, and at the offices of a Butte of Mines and Geology, Moscow, Idaho, the Montana Bureau of Mines and Geology, . Montana, Salt ana, and the Wyoming Geological Survey, Laramie, Wyoming, and the University of Utah, Lake City, Utah.

Cumulative Chemical anal ses -rcent oss on thickness Rock description no. (feet) (feet) ORTH WOOLEY RANGE IDAHO. LOT NO. 1230 osphatic shale member d Phosphoria formation sampled in bulldozer trench on northeast limb of Wooley Valley anticline, sec. 24, T. 6 S 4Z E R Caribou County, Idaho. Beds strike N. 40° W. and dip 57* NE. Section measured by R. A. Hoppin, C. E. Weaver, R. L. Parker, mil' Sheldon. F. W. Os Malley, and V. E. McKelvey and sampled by J. A. Noel and R. A. Smart in July 1948. Samples analyzed by U. S. Bureau of Ore on. Bed Cumulative ThicimesSr Chemical anal ses -rcent Sample Thickness Sample Thickness no. Rock description oss on c thickness percent P,O percent no. (feet) P205 A1203 Fee2°3 293 ignition insoluble insoluble (cumulatfirer PZ°5 Al2°3 ignition (feet) (cumulat Res member of Phosphoria formation--basal bed only Om Cheri 1289- RAH Phos hatic shale member of Phos oria formation P-92 la, - tone 1288- RAH P-91 hi - tone 1287- RAH P-90 id, tone, calcareous and mudstone 1286- RAH 1,-89 1285- RAH . -88 Mu tone; fos. col. no. 48-JES-811 1284- RAH P-87 $phate rock, argillaceous; fos. col. . 48-JES-80 1283- RAH .,P-86 tone; fos. col. no. 48-JES-79 1282- RAH S. 6 8.-8S Mu tone, calcareous; fos. col. no. -JES-78 1281- RAH , P-83 Pbaphate rock 1205- RLP tone; Rms. col. no. 48-JES-77 1280- RAH 43Z P' -tone and limestone 1204- RLP P-81 ph. phate rock 1203- RLP 40 p , tone, calcareous; fos. col. no. P-76 4 -JES-76 1201- RLP ' phate rock 1200- RLP P-79 Phate rock 1202- RLP Pft77 Pb''Phate rock 1305-WOM t.76 spbate rock; fos. col. no. 48-JES- 75 1304-WOM Phate rock, argillaceous; fos. col. . 48-JZS-74 1212-CEW aphate rock and phosphatic mudstone 121I-CEW 2--78 M. stone, phosphatic, and argillaceous , oaphate rock; fin. col. no. 48-JES-73 1210-CEW P-72 M tone, phosphatic; fos. col. no. -JES-72 1229- RPS 599.0e. P-71 Li .. estone and mudstone 1228- RPS Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. II - Idaho 1

Bed no. Rock description Sample no. Thickness (feet) P 0 Chemical anal sea . - rcent Loss on Acid Al 0 2 3 Fe 0 2 3 ignition insoluble Cumulative thickness (feet) Thickness s percent P,OK

P-70 P-69 P-68 P-67 P-66 Modstone, phosphatic, calcareous; fos. col. no. 48-JES-71 Mudstone; fos. col. no. 48-JES- 70 htudstone, phosphatic Mudstone, phosphatic Mudatone 1227- RPS 1226- RPS 1225- RPS 1224- RPS 1223- RPS S.5 P-65 P-Di P-63 Pi-62 '-61 Mudstone, phosphatic; fos, col. no. 48-JES-69 Phosphate rock, argillaceous Muatone; fos. col. no. 48-JES-68 Mudatone Mudstone; fos. col. no. 48-JES-67 1222- RPS 1218-CEW 1303-W08( 1302-WOM 1301-WOM P-60. P-'9 P-58 D P-se.-- Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 48-JES-66 Mudatone Mudstone, phosphatic; fos. col. no. 48-JES-65 Mudstone and phosphate rock 1300 -WOM 1232-WOM 1231-WOM 1230-WOM 1215-CEW P. s& P-51 p . p.:2 13-cn Mudstone Mudstone and phosphatic mudstone k., maudstone Mudstone and phosphatic mudstone Mudatone and phosphate rock 1214-CEW 1221- RPS 1220- RPS 1238- RPS

P-49 n re -la Mudatone and argillaceous phosphate rock; fos. col. no. 48 -JES-64 Mudstone and phosphate rock Mudstone and phosphate rock Mudstone; fos. col. no. 48-JES-63 Mudstase 1237- RPS 1236- RPS 1235- RPS 1234- RPS 1269- VEM -­

6S. 9 1,004.36 1,018.57 ..P-45 ;14 p.11A3 ,-112 `-'41 Phosphate rock Mudstone, phosphatic Nudatone, calcareous, phosphatic Mudstone, phosphatic Mudatone 1268- VEM 1267- VEM 1266- VEM 1265- VEM 1264- VEM

I, 110.79 1,140.79 1,155.77 1,164. S9 1,168.07 PI,..-4,8 i,.;9 „ '8 pa-:37 Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Limestone; fos. col. no. 48-JES-62 1263- VEM 1262- VEM 1261- VEM 1260- VEM 1279 -WOM

1,177.67 1,181.67 1,194.98 1,229.63 1,231.83 P-35 .. umestone; fos. col. no. 48 -JES-61 1278-WOM 1,232.91 II-Idaho 2

P-34 P-33 P-32 P-31 P-30 P-29 ?-28 P-27 P-26 P-25 Mudstone; fos. col. no. 48-JES- 60 Mudstone, phosphatic Mudstone; fos. col. no. 48 -JES- S9 Illudatone, phosphatic; fos. col. no. 48-JES- 58 Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone and phosphate rock Mudstone and phosphate rock Phosphate rock 1277-WOM 1276-WOM I 275-WOM 1274-WOM 1273-WOM 1272-WOM 1247- CEW 1246- CEW 1245- CEW 1244- CEW 14. S 1, 235. 61 1, 240. 06 1, 250. 32 1, 285. 94 1, 336. 69 1, 348.49 1, 354.02 1, 400. 74 1, 418. 67 1, 525. 26 P-24 P-23 P-22 P-21 P-20 Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous; fos. col. no. 48-JES-57 Mudstone, phosphatic Mudstone and phosphate rock 1243- CEW 1242- CEW 1241- CEW 1240- CEW 1309- CEW 1, 587.96 1, 627. 41 1,676.05 1, 705. 95 1, 739. 55 P-19 Phosphate rock, argillaceous P-18 Phosphate rock P17 P-16 Phosphate rock, argillaceous P-15 Mudstone, phosphatic Phosphate rock P-14 P-I3 bludstooe, phosphatic Phosphate rock P-12 Mudstone, phosphatic and phosphate rock; fos. col. no. 48-JES- 56 P-Il Phosphate rock P-10 Phosphate rock, argillaceous; fos. col. nO. 48-JES- 55 P- 9 P- g

Phosphate rock, argillaceous P- 7 zwisphate rock Phosphate rock P- 6 htudstone P- S Limestone. argillaceous P- 4 P- 3 Mudstone; fos. col. no. 48-JES-54 P- 2 Mudstone Limestone, argillaceous; fos. col. no. 48-JES-53 P. 1 Phosphate rock 1308- CEW 1307- CEW 1306- CEW 1219- CEW 1314- RAH 1313- RAH 1312- RAH 1311- RAH 1310- RAH 1294 -WOM 1299 -WOM 1298-WOM 1297-WOM 1292-WOM 1291 -WOM 1290-WOM 1271-WOM 1270-WOM 1296-WOM O. 3 S. 5 62.. Z 1,769.79 1, 884. 71 2, 004. 31 2, 035. 28 2, 114. 28 2, 129. 80 2, 190. 46 2, 227. 36 2, 292. 22 2, 305.96 2, 314. 06 2,413.82 2, 473.62 2, 475. 79 3, 476. 14 2, 476. 50 2, 476. 56 2.478. 00 2, 491.08 CwLimestone; fos. col. no. 48-JES- 52 Wells formation II - Idaho 3

SPECTROGRAPHIC ANALYSES—NORTH WOOLEY RANGE, IDAHO. LOT NO. 1230. Semi-quantitative analyses of selected samples of the phosphatic shale member of the Phosphoria formation, North Wooley Range, ho (see immediately preceding pages for location of section, thickness and description of strata, and chemical analyses of samples), de by the U. S. Geological Survey, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the le below, Sb, As, Be, Bi, Cs, Co. Cb, Dy, pr, Eu, Gd, Au, Hf, Ho, Li, Lu, Nd, Pt, K. Pr, Rb, Sm, Sc. Ta, Te, Tb, T1, Th, Tm, Ti, and W were looked for in all samples but were not detected. Explanation of symbols A more than 10 percent F 0.001-0.01 percent B1= 1-10 percent/ G less than 0.001 percent D 0.1-1 percent ND not detected E 0.01-0.1 percent Sample no. Al Ba B Cd Ca Cr Cu Fe Ga In La Pb Mg Mn Mo Ni P Si Ag Na Sr Ti Y Yb Zn Zr Beds P-92 through P-84 not analyzed. 1205-RLP DFNDNDADF ENDNDENDEEFE AB'GDDEDEGNDF 1204-RLP A F FNDB'DFB1 NDF F FDDFEB'AGDEDEEGEE 1203-RLP B'FNDNDADFDFNDEFEEFE AB'GDDEEEGNDF 1202-RLP B'FNDNDADFDNDNDENDEEFE AB'GDDEEEGNDF 1201-RLP A EFNDB1 DEIVF G F FDDFEB'AGDEDEEGEE AB'GDDEDEGEF 1305-WOM B'FNDE ADF DNDNDENDEEF E AB'GDDEDEGEF 1304-WOM DFNDF A D F ENDNDENDEEF E AB'GDDFDEGNDF 1212-CEW F G ND E E E F E AB'GDDEDEGEF 1200-RLP B'ENDNDADFDFNDENDEEF E BIFNDE A D E D 12.11-CEW E E F E AB'GDDEDEGEF B'FNDE A D E D F G ND E 1210- CEW A ENDEB'DEB'F G E E E DEEB'AGDDDDEGEE Beds P-72 through P-27 not analyzed. EEFEAB'GDDEEEGEF 1245-CEW B'ENDNDADEB'FNDEF AB'GDDEEEGEF 1244-CEW B'FNDNDADEDFNDEF E E F E AWGDDEEEGEF 1243-CEW B'NDNDNDADFB'FGEF E D F E E AB'GDDEDEF EE 1242-CEW B'FNDE A D E D F G E E E D F AB'F D D E D E F E F 1241-CEW B'FNDNDADEDFNDEEEEFE 1240- CEW A ENDEBIDEWF GEEEEEEB'AF D D D D E F EE EEEEB`AFDDEDEGEE 1309-CEW A FNDEB'DEB'FNDEF 1308- CEW B'FNDE A E E D F G E F E D F E AB'GDDEDEGEF 1307-CEW BIFNDE A D F DNDNDEFEEFEAB'GDDEDEGEF II -Idaho 4

NORTH RASMUSSEN VALLEY, IDAHO. LOT NO. 1233. Phosphoria formation sampled in bulldozer trench on northeast slope of Rasmussen Valley, sec. 6, T. 7 S., R. 44 E., Caribou County, Idaho, on southwest limb of Snowdrift anticline. Beds strike N. 53' W. and dip 63' SW. Section measured by R. A. Hoppin, C. E. Weaver, R. L. Parker, R. P. Sheldon, D. F. Davidson, and F. W. 0' Malley and sampled by R. A. Smart and R. G. Waring. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical anal ses - rcent Cumulative Thickness x Sample Thickness Bed Rock description oss on ci thickness percent P,Oc no. no. (feet) P 0 Al 0 Fe2O3 ignition insoluble (feet) (cumulatiifer Dinwoody formation Siltstone 1418- RAH Phosphate rock, argillaceous, conglomeratic 1417- RAH Rex member of Phosphoria formation R-28 Mudstone; fos. col. no. 48-JES-821 1416- RAH R-23 Mudstone; fos. col. no. 48-JES-83 1415- RAH R-22 Mudstone 1414- RAH R-z1 Phosphate rock, argillaceous 1413- RAH Mudstone 1412- RAH R-zo R-19 Mudstone 1411- RAH R-18 Mudatone, cherty 1410- RAH R-17 Chert 1408- RAH Mudstone; fos. col. no. 48-JES-84 1409- RAH R-16 R-IS Mudstone, cherty; fos. col. no. 48-JES-85 1407- RAH R-14 Mudstone 1406- RAH R-13 Mudstone 1405- RAH R-12 Mudatone 1404- RAH R-11 Mudstone 1403- RAH R- to Mudatone 1402- RAH R- 9 Mudstone 1401- RAH R- e Mudstone 1400- RAH Mudatone 1399- RAH Mudstone 1398- RAH ct- 5 Chert 1397- RAH Chen and mudstone 1396- RAH Chert 1395- RAH R- 2 Chert 1394- RAH RChen 1384- DFD Lot no. 1233. II- Idaho 6

Phosphatic shale member of Phosphoria formation Mudstone Mudstone Mudstone Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 48-JES-103 1383- DFD 1382- DFD 1381- DFD 1380- DFD 1339- DFD Mudstone Mudstone; fos. col. no. 48 -JES-104 Mudstone Phosphate rock Phosphate rock and mudstone 1338- DFD 1337- DFD 1336- DFD 1335- RLP 1334- RLP Mudstone Phosphate rock Phosphate rock, argillaceous Phosphate rock Phosphate rock 1525-WOM 1524 -WOM 1332- RLP 1331- RLP 1330- RLP Phosphate rock Phosphate rock Mudstone, phosphatic Mudstone Mudstone, phosphatic 1523-WOM 1522-WOM 1379 - WOM 1349- RPS 1348- .RPS Mudstone and argillaceous phosphate rock Mudstone and phosphate rock; fos. col. no. 48-JES-105 Phosphate rock, argillaceous Mudstone Phosphate rock and mudstone 1347- RPS 1521 -WOM 1520 -WOM 1345- RPS 1344- RPS Phosphate rock, argillaceous Mudstone Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 48-JES-106 Mudstone 1343- RPS 1342- RPS 1529-WOM 1528-WOM 1340- RPS -5/ Mudstone Phosphate rock, argillaceous Mudstone Mudstone Mudstone and phosphate rock 1369- RAH 1368- RAH 1367- RAH 1366- RAH 1365- RAH S.9 Mudstone Mudstone Phosphate rock, argillaceous Mudstone, phosphatic 1364- RAH 1363- RAH 1378-WOM 1377-WOM Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot no. 1233. II - Idaho 7

P-11 P-10 P- 9 P- 8 /3" 7 Mudstone, phosphatic Phosphate rock Mudstone, phosphatic Phosphate rock, argillaceous Mudstone 1354- CEW 1353- CEW 1352- CEW 1351- CEW 1350- CEW 1,796.85 1,934.85 1,940.93 1,958.08 1,961.99 P- 6 P- 5 P- 4 P- 3 P- 2 Phosphate rock Phosphate rock, calcareous, argillaceous; fos. col. no. 48-JES-125 Phosphate rock Phosphate rock Mudstone, calcareous 1000- RAH 1319- RAH 1419-WOM 1233-WOM 1317- RAH 2,001.06 2,012.05 2,079.85 2,177.35 2,183.95 P- 1 Phosphate rock 1316- RAH 0.98 0.82 2,200.15 Wells formation Limestone 1315- RAH Lot no. 1233. II - Idaho 9

SPECTROGRAPHIC ANALYSES—NORTH RASMUSSEN VALLEY, IDAHO. LOT NO. 1233. Semi-quantitative analyses of selected samples of the phosphatic shale member of the Phosphoria formation, North Rasmussen Valley, Idaho (see immediately preceding pages for location of section, thickness and description of strata, and chemical analyses of samples), made by U. S. Geological Survey, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Be, Bi, Cs, Cb, Dy, Er, Eu, Gd, Au, Hf, Ho, Li, Lu, Nd, Pt, K. Pr, Rb, Sm, Sc, Ta, Te, Tb, T1, Th, Tm, Sn, Ti, and W were looked for in all samples but were not detected. Explanation of symbols A more than 10 percent F 0.001-0.01 percent B's 1-10 percent/ G less than 0.001 percent D 0.1-1 percent ND not detected E 0.01-0.1 percent Bed Sample no. Al Ba B Cd Ca Cr Co Cu Fe Ga La Pb Mg Mn Mo Ni P Si Ag Na Sr Sn Ti Y Yb Zn Zr no. Beds P-83 through P-76 not analyzed. P-75 1353-CEW D FNDE A E ND F D ND E ND E E F E A B'NDD E ND F E E GNDF P-74 1334-RLP B' FNDE A ENDF B' F ENDD ENDE A B' G D DNDE E E G E F P-73 1525-WOM 13° F ND ND B' E ND F. B' F ND ND D F F E B' A G D E ND D E ND ND ND F P-72 1224-WOM B' GNDNDA ENDF B'NDENDE FNDE A B'G D ENDE E E GNDF P-71 1332-RLP B'FNDE A DNDFB'F ENDDENDE A AGDDNDEEEGEF P-70 1331-RLP DFNDEAENDFDNDENDEENDEAB'GDDNDEEEGEF P-69 1330-RLP D F ND E A D ND F D ND E ND D E ND E AB'GDDNDEEEGEF P-68 1523-WOM B' GNDNDA DNDF B'NDENDD FNDE A B' G D ENDE E E GNDF P-67 1522-WOM B' F ND ND A D ND F B' ND E ND D F ND E A B' G D E ND E E E G ND F P-66 1379-WOM AFNDNDB'DNDFB'FNDFDFFEB'AGDENDEEEGNDF Beds P-65 through P-24 not analyzed. P-23 P-22 1393-WOM 1392-WOM B'FNDEB'DNDFB'F B' FNDE A DNDF B' F E ND D ENDD E E F F EB'AGDENDEEEGEF E B' EP G D DNDE E E G E F P"2I P-20 1391-WOM 1390-WOM B'FNDEB'DNDEB'F EEDFFEB'AFDENDEEEGEF B'FNDEB'DNDEB'FEEDFF EIYAFDENDEDEGEF '- 1389-WOM B'FNDEB'DNDEB'F EEDFFEB'AFDDNDEEEGEF P-19 P-18 P-17 P-16 P-1S 1388-WOM 1387-WOM 1386-WOM 1359-CEW 1358-CEW B'FNDE ADNDFB'NDENDDF FE AB'F DDNDEEEGEF B'FNDEB'ENDFB'F ENDDEF EB'AGDENDEEEGEF B'FNDE ADNDFB'NDEFDFFE AB'GDDNDEEEGEF E E E D E E D G G E A E F E D ND E F D F GE AB'GDEF E F D E F E D E G E A E ND F D ND F F D F GE AB'GDEF 1)"14 P-13 P-12 P"11 P-10 1357-CEW 1356- CEW 1355-CEW 1354-CEW 1353-CEW D F ND E ABEFB'NDEEDNDFE AB'NDBI DNDEEEGEF E F B' F G ND E B' E ND F B' F ND E D E F E B' A G D E ND D E F B'FNDE AENDFB'NDENDDEFE AB'GDDNDEEFGEF F A FNDEB'ENDFB'FNDNDDE F EB'A G D E ND D E F G E D F ND E AENDFDNDENDDFNDEAB'GDDNDEEFGEF II-Idaho-10

P-9 1352-CEW AFNDEB'ENDFB'FNDNDDEFEB'AGDENDEEFGEF P-8 1351-CEW B'FNDEAENDFB'FENDDEFEB'B'GDDNDEEFGEF P.7 1350- CEW D F ND E A E ND F D ND ND F AEFEDB'GDENDFEFGEF P-6 1000-RAH B'EFE AENDEDNDEFDFFE AB'GDENDEDEGEF P-5 1319-RAH B'FINDEAENDFBINDENDB'EFEB'B'GDENDEEFGEF P-4 1419-WOM DGNDEAENDFDNDENDDFNDEADGDENDFEEGEF P-3 1233-WOM DFNDEADNDFB'NDEEDFFEAB'GBI ENDEEEGEF P-2 1317-RAH B'FNDEB'ENDFB'FNDNDB'EFDDANDDENDEEFGEF P-1 1316-RAH B'FNDEAENDFWNDENDDENDEAB'GDDNDEEFGEF 1 B' is equivalent to B and C of the Bureau of Mines analyses as recorded in other reports. Lot no. 1233. II- Idaho 11

SOUTH RASMUSSEN VALLEY, IDAHO. LOT NO. 1232. Phosphatic shale member of Phosphoria formation sampled in bulldozer trench on northeast slope of Rasmussen Valley, sec. 9, T. 7 S. R. 44 E., Caribou County, Idaho, on southwest limb of Snowdrift anticline. Beds strike N. 45* W. and dip about 60* SW. Many beds within the Phosphatic shale member are locally tightly folded, faulted, and overturned. Section measured by F. W. 0' Malley and D. F. Davidson and sampled by R. A. Smart and R. G. Waring in July 1948. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal ses - rcent oss on c F A1203 e2°3 ignition insoluble Cumulative thickness (feet) Thickness a (cumulative2 e) percent P 05 Rex member of Phosphoria formation-basal beds only R- 6 Cheri 1492- DFD R- 4 Chert Chert 1491- DFD 1490- DFD

.. OP /71- 3 R- 2 Chert Chert 1474- DFD 1473- DFD R- 1 Chert 1472- DFD Phosphatic shale member of Phosphoria formation Mudstone, cberty Mudstone Mudstone 3190-WOM 3189 -WOM 3188 - WOM Phosphate rock, argillaceous Mudstone 3187-WOM 3186-WOM Mudstone Phosphate rock, argillaceous Mudstone 3185-WOM 3184 -WOM 3183-WOM Mudstone Mudstone, calcareous, phosphatic 1459- DFD 1458- DFD Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous 1457- DFD 1456- DFD 1455- DFD 1454- DFD 1453- DFD Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous Mudstone, phosphatic Mudstone, calcareous 1452- DFD 1451- DFD 1450- DFD 1439- DFD 1438- DFD 339. J2 / Mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic 1437- DFD 1479- DFD 1478- DFD 1477- DFD , Lot no. 1232. II - Idaho 12

P-48 Mudstone, phosphatic 1476- DFD P-47 Mudatone, phosphatic 1475- DFD OP .11, P-46 Mudstone, phosphatic 1436- DFD P-4S Mudstone, calcareous and phosphate rock 1435- DFD P-44 Phosphate rock, argillaceous 1434- DFD P-43 Mudstone 1433- DFD P-42 Mudstone, phpsphatic; fos. col. no. 48-JES-128/ 1432- DFD P-41 Mudstone, phosphatic 1431- DFD P-40 Mudstone 1430- DFD P-39 Mudstone and argillaceous phosphate rock 1445-WON P-38 Mudstone 1444 -WOM P-37 Mudstone 1443-WOM P-36 Phosphate rock, argillaceous 1442-WOM P-35 Mudstone, phosphatic 1441 -WOM P-34 Mudstone and calcareous argillaceous Ol phosphate rock 1440-W0Pd P-33 Mudstone 1429-WOM P-32 Mudstone, phosphatic 1428 -WOM P-31 Mudstone, phosphatic and argillaceous phosphate rock 1427-WON P-30 Mudatone, phosphatic, calcareous 1426-WOM P-29 Mudstone 1425-WOM P-28 Mudstone 1424 -WOM P-27 Mudstone, phosphatic 1423-WON P-26 Mudstone, phosphatic 1422-WON P-25 Mudstone, phosphatic 1421-WOM P-24 Mudstone, phosphatic 1420 -WON P-23 Mudstone, phosphatic 1488-WOM P-22 Mudstone, phosphatic 1487-WOM P-21 Phosphate rock, argillaceous, calcareous 1486 -WOM 1,061.84 P-20 Phosphate rock; fos. col. no. 48 -JES-126 1485-WON The thicknesses of beds P-20 through P-1 are approximation due to complications by folding and are possibly accurate to within only ten percent. P-19 Mudstone, phosphatic, and argillaceous 1,103.34 phosphate rock 1484 -WCIM 2.5? 1,108.92 P-18 Phosphate rock, argillaceous 1483-WON 1,129.83 P-17 Mudatone, phosphatic 1482-WOM 1.7? 1,139.85 P-16 Mudstone, phosphatic 1481 - WOM 1,151.70 P-1S Phosphate rock, argillaceous 1480 - WOM 1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot no. 1232. II - Idaho 13

Chemical anal ses - rcent Cumulative Thickness s Bed Sample Thickness Rock description Loss on thickness percent P O , no. no. (feet) P05 A1203 Fe..0 e. 3 ignition insoluble (feet) (cumulative) P-14 P-13 P-12 P-11 P-10 Phosphate rock Mudstone, phosphatic Phosphate rock Phosphate rock Limestone, argillaceous, phosphatic 1469-WOM 1468-WOM 1489 -WOM 1467-WOM 1466-WOM 4.0? 1,280.50 1,287.35 1,457.96 1,531.56 1,535.28 P- 9 P-II P- 7 P- 6 P- S Phosphate rock, argillaceous, calcareous, and phosphatic mudstone Mudstone, calcareous, phosphatic Phosphate rock Phosphate rock, argillaceous Phosphate rock; fos. col. no. 48-JES-127 1465-WOM 1464 -WOM 1463-WOM 1462-WOM 1461-WOM 1.6? 1.8? 1,580.40 I, 588.87 1,714.87 1,724.59 1,782.37 P- 4 !- 3 f.:P- 2 P- 1 Phosphate rock, calcareous Phosphate rock Mudstone, calcareous Phosphate rock, calcareous 1460 - WOM 1449-WOlil 1448-WOW 1447-WOW 0.4? 4.0? 1,794.33 1,829.75 1,836.55 1,837.40 Wells formation Cvr-1 Mudstone, calcareous 1446 -WOM 01 no. 1232. II - Idaho 14

SPECTROGRAPHIC ANALYSES—SOUTH RASMUSSEN VALLEY, IDAHO. LOT NO. 1232. Semi-quantitative analyses of selected samples of phosphatic shale member of Phosphoria formation. South Rasmussen Valley, Idaho (see immediately preceding pages for location of section. thickness and description of strata, and chemical analyses of samples), made by U. S. Geological Survey Laboratory, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Be. Bi. Ce. Cs, Co. Cb, Dy, Er, Eu, Gd, Ge, Au, Ho, Li, Lu, Nd. Pt, Pr, Rb, Sm, Sc. Ta, Te, Th, Ti, Tin. and W were looked for in all samples but were not detected. Explanation of s .. bols A more than 10 percent F 0.001-0.01 percent B's 1-10 percent G a less than 0.001 percent D 0.1-1 percent ND g not detected a 0.01-0.1 percent Bed Sample no. Al Ba B Cd Ca Cr Cu Fe Ga La PbMg Mn Mo Ni P Si Ag Na Sr Sn Ti V Y Yb Zn Zr DO. Beds P-72 through P-64 not analyzed. 1458-DFD B'EGE A EEDF EEDFNDF AB'GDEF EDEGEF 1457-DFD DEFEAEEDNDENDDFNDF AB'GDEFEDEGEF 1456-DFD B'EGE A EEDF E F D F ND E AB'GDENDEDEGEF 1455-DFD B'EGE A EEDF F F DFNDE AB, GDENDEDEGEF 1454-DFD B'EGE A EEDF EFDFNDE AB'GDENDEDEGEF 1453-DFD B'EGE A EEDF EFDFNDE AB'GDEF EDEGEF 1452-DFD B'EGE A EEDF E F DFNDE AB'GDEFEDEGEF 1451-DFD B'EF E AEEDFEFDFNDEB'AGDENDEDEGEE -SS 1450- DFD B'EF E A EEDF F FDFNDEB'AGDEF EDEGEE 1439-DFD B'EF E A EEDF F F DFNDEB'AGDENDEDEGEE Beds P-53 through P-25 not analyzed. 1420-WOK A EFNDB'EEDF F F DFNDEB'AGDENDDDE-GEE 1488-WOK A EFNDEPDEDF FNDDFNDEB'AGDENDDDEGEE 1487-WOM A EFNDB'DEDF F F DFNDEB'AGDENDEEEGEE 1486-WOM A EFNDB'EEB'F E F DFNDEVAGDENDEDEGEE 1485-W0M B'EGF AEEDF EFDENDE AB'GDENDEDEGEE 1484-WOK B'EF EB'DEDF EFDFNDEB'AFDENDDDDGEE 1483-WOM BIEF FB'EEB'F F F DFGEB'AFDENDEDEGEE 1482-WOM A E F FB'EEB'F FNDDFGEB'AGDENDEDEGEE 1' -16 1481-WOM WEF FB'EEDFEF DFNDEB'AFDENDEDEGEE -IS 1480-WOK B'EGFB'EEDF ENDDFNDEB'AGDENDEEEGEE *-14 1469-WOM D E G E AEEEFEFDFNDEAB'GDEF E D E G E E r'-13 1468-WOM A EGFB'EEDF F F DFNDEB'AGDENDDDF GEE 1489-WOK D E ND E A E E E ND F F D F ND E AB'GDEF E D E G E E 1 B' is equivalent to B and C of Bureau of Mines analyses as recorded in other reports. Lot no. 1232. I1 - Idaho 15

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TRAIL CANYON, IDAHO. LOT NO. 1206. Phosphatic shale member and part of Rex chart member at Phosphoria formation sampled in bulldozer trenches and from natural outcrop on north side of Trail Canyon, SW corner of NWINW* sec. 30, T. 8 S. R. 43 E., Caribou County, Idaho, on west limb of Trail Creek syncline. Beds strike N. 12' W. and dip 135° Z. Section measured by R. A. Gulbrandsen, R. A. Hoppin, V.. E. McKelvey, and L. E. Smith and sampled by R. S. Sears, R. P. Sheldon, 0. A. Payne, and Gulbrandsen in August 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical ...1 1 es . -reent Cumulative Thickness x Bed Sample Thickness Rock description Loss on thickness percent P,O, tux no. (feet) P205 A.1203 Fe203 F Act ignition insoluble (feet) (cumulatiiier Rex member ot 1Phospboria formation R­ 39 Chart RAH- 241-47 R-

Ow

38 Chart RAH- 240-47 R- 37 Chart, silty RAH- 239-47 0.s a­ 36 Chart RAH- 238-47 aIND 3S Chert, silty RAH- 237-47 R­ 34 Mudstone RAH- 236-47 R- ft

33 Mudstone RAH- 23S-47 32 Mudstone RAH- 234-47 a-

31 Mudstone RAH- 233-47 0.S 85. S R­ 30 Chart RAH- 232-47 R- 29 Chart RAH- 231-47 a- 28 Chart RAH- 230-47 R­ 27 Chert RAH- 229-47 R-

26 Chart RAH- 228-47 94. S 110. S R- 25 Chart RAH- 227-47 116. S R­ 24 Chart RAH- 226-47 R­ 23 Chen RAH- 22S-47 R­ 22 Chart RAH- 224-47 aK- Chart RAH- 223-47 13S. 1 OD

Chart RAH- 222-47 9Z. 9 a- 19 Chart RAH- 221-47 R­ 1$ MP Chart RAH- 220-47 R­ 17 Chart and limestone RAH- 219-47 R- 16 R-

Chart and limestone RAH- 218-47 81. S 15 Chart and limestone; fos. col. no.

ND 47-I1W-152/ RAH- 218-47 Preceding section measured along road (beds R-26 to R-39) and in cut SO feet above road (beds R-1S to R-25); following section (beds R-1 to R-14) measured in trench 200 feet above road. Contact between beds R-25 and R-26 (black chart and pinkish white chart) is exposed at road and lower cut; beds below R-1S are concealed along road and beds R-13 to R-25 are largely concealed at upper trench level. Thickness of beds R-15 to R-25 is 69.7 feet, but computed thickness of same sequence at upper trench is 59 feet. The larger (measured) Bore is used in computing total thickness of Rex member. 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot no. 1206. II - Idaho 17

Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal A1203 Fe203 F - a - rcent ignsson ition - insol bl u e Cumulative thickness (feet) Thickness a percent P,0„ (cumnlatrier - 13 Limestone. cherty Chert RAH- 213-47 RAH- 212-47 Limestone, locally cherty Chert, contains scattered RAH- 211-47 limestone concretions RAH- 210-47 - 10 Cher% contains limestone concretions and lenses RAH- 209-47 Limestone, locally cherty Chert, contains thin limestone RAH- 208-47 lenses RAH- 207-47 S. 7 Limestone, argillaceous Chert, contains thin limestone RAH- 206-47 lenses RAH- 205-47 S Limestone, contains cherty limestone beds RAH- 204-47 4 Chert RAH- 203-47 S. 6 Limestone, argillaceous Chert RAH- 202-47 RAH- 201-47 Chert, contains mudstone layers RAH- 200-47 Phosphatic shale member of Phosphoria formation P P P P Mudstone, phosphatic; fos. col. no. 47-11W-122. Phosphate rock, argillaceous; foe. col. no. 47-HW-172 Mudstone Mudstone, phosphatic Mudstone VEM -274-47 VEM-273-47 VEM-272-47 VEM-271-47 VEM-270-47 P P P P P Mudstone; fos. col. no. 47-11W-123 Mudstone, argillaceous; fos. col. no. 47-HW-124 Mudstone, calcareous, possibly concretionary Maidstone, possibly concretionary; fos. col. no. 47-HW-153 Limestone, argillaceous; foe. col. no. 47-HW-154 VEM -269-47 VEM-268-47 VEM-267-47 VEM-266-47 RAG6-47 P P P P P Mudstone; fos. col. no. 47-HW-154 Phosphate rock, argillaceous; foe. col. no. 47-HW-173 Mudstone Phosphate rock Phosphate rock RAGRAGRAGRAGRAG5-47 S6.7 Lot no. 1206. 11 - Idaho 18

P-195 P-194 P-193 P-192 P-191 Phosphate rock Phosphate rock Phosphate rock, contains phosphatic limestone concretion 0.2 foot thick Mudstone Phosphate rock VEM-265-47 VEM-264-47 VEM -263-47 VEIL-262-47 VEM-259-47 3.6S P-190 P-I89 P-188 P-187 Limestone VEIL-258-47 Mudstone VEM-257-47 Phosphate rock VEIL-256-47 Phosphate rock, calcareous, concretion in bed P-188 VEM-255-47 Phosphate rock and phosphatic mudstone; fos. col. no. 47-HW-155 VEM-254-47 (0. 0-0.4) P-186 P-185 P-184 P-183 Phosphate rock, calcareous, contains phosphatic mudstone concretions; fos. col. no. 47 - ffW-156 Phosphate rock, argillaceous Phosphate rock, calcareous Limestone concretion; fos. coL no. 47-HW-157 Mudstone, calcareous, phosphatic; fos. col. no. 47-HW-158 VEM-253-47 VEM-252-47 VEM-251-47 VEM-250-47 VEM-249-47 (0.0-0.7) P-182 P-181 P-180 P-179 P-178 Mudstone; fos. col. no. 47-HW-159 Mudstone; fos. col. no. 47-HW-160 Mudstone; fos. col. no, 47-HW-161 Mudstone; fos. col. no. 47-HW-I62 Phosphate rock, argillaceous VEM -248-47 VEM -247-47 VEM -246-47 VEM-245-47 VEM-244-47 P-177 P-176 P-175 P-174 P-173 Mudstone, phosphatic Phosphate rock Phosphate rock, argillaceous, and calcareous mudstone Phosphate rock, calcareous, argillaceous; fos. col. nos. 47-HW-163 and 47-HW-164 Phosphate rock, calcareous; fos. col. no. 47-HW-165 VEM-243-47 VEM-242-47 VEM-241-47 VEM-240-47 VEM-239-47 375. OS P-172 P-171 P-170 Limestone, phosphatic, argillaceoust fos. col. no. 47-11W-166 Phosphate rock, calcareous, argillaceous; fos. col. no. 47-HW-167 Phosphate rock, calcareous, argillaceous; fos. col. no. 47-HW-168 VEM-238-47 VEM-261-47 LES- 356-47 Lot no. 1206. II - Idaho 19

Chemical analyses (percent Cumulative Thickness x Bed Sample Thickness Rock description F Loss on Acid thickness percent P,O_c no. no. (feet) Al203 Fe2O3 P205 ignition insoluble (feet) (cumulatifer Limestone VEM-260-47 (0.0-0.3)

VEM-260 represents two concretions of 0.0-0.3 and 0.0-0.2 foot thickness in beds P-171 and P-170 respectively. P-169 Phosphate rock, calcareous, argillaceous, contains calcareous concretions; fos. col. no. 47-11W-169 P-168 Phosphate rock, calcareous; fos. col. no. 47-HW-170 Limestone, concretion in bed P-168 P-I67 Limestone, phosphatic, argillaceous; fos. col. no. 47-HW-171 LES- 355-47 LES- 349-47 LES- 350-47 LES- 348-47 (0.45) 34r61 P-I66 P-165 P-164 P-162 Limestone, argillaceous, phosphatic Limestone, phosphatic, argillaceous; fos. col. no. 47-HW-88 Phosphate rock, calcareous Phosphate rock, calcareous Phosphate rock, calcareous, argillaceous LES- 347-47 LES- 346-47 LES- 345-47 LES- 344-47 LES- 343-47 P-161 P-16° P-159 P-158 P-157 Phosphate rock, calcareous, argillaceous Phosphate rock, calcareous, argillaceous Phosphate rock, calcareous, argillaceous Phosphate rock, calcareous, argillaceous Phosphate rock, calcareous, argillaceous, contains limestone concretions LES- 342-47 LES- 341-47 LES- 340-47 LES- 339-47 LES- 338-47 0.6S

P-156 p-155 P-154 P-153 P-152 Phosphate rock, calcareous, argillaceous Phosphate rock, argillaceous Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic LES- 337-47 LES- 336-47 LES- 335-47 LES- 334-47 LES- 333-47 P-151 !-150 Mudstone, phosphatic Limestone, argillaceous Limestone; fos. col. no. 47-HW-87 LES- 332-47 LES- 331-47 LES- 330-47

11, Lot no. 1206. II - Idaho 20

P-148 P-147 P-146 P-145 P-144 Mudstone, calcareous Mudstone, phosphatic M udstone, phosphatic Phosphate rock, argillaceous Mudstone VEM-237-47 VEM-236-47 VEM-235-47 VEM-234-47 VEM-233-47 Or Oa P-143 P-142 P-141 P-140 P-139 Mudstone Mudstone; fos. col. no. 47-HW-86 Mucistone Mudstone Mudstone, phosphatic VEM-232-47 VEM-231-47 VEM -230-47 VEM -229-47 VEM-228-47 01, P-138 P-137 P-136 P-135 P-134 Mudstone Phosphate rock, argillaceous Mudstone Mudstone Mudstone, phosphatic VEM-227-47 VEM-226-47 VEM-225-47 VEM-224-47 VEM -223-47 3. S OP. 698. S4 P-133 P-132 P-131 P-130 P-129 Mudstone, phosphatic Mudstone Mudstone; fos. col. no. 47-HW-85 Mudstone Mudatone VEM-222-47 VEM-221-47 VEM-220-47_ VEM 219-47 VEM-218-47 P-128 P-I27 P-126 P-I25 P-I24 Mudstone Mudstone and phosphate rock Mudstone Mudstone, phosphatic Mudstone; fos. col. no. 47-HW-84 VEM-217-47 VEM-216-47 VEM-215-47 VEM-214-47 VEM-213-47 P-123 P-122 P-121 P-120 P-119 P-118 P-117 P-116 P-115 P-114 P-113 P 111 P-110 P-I09 P-108 P-107 P-105 Mudstone Mudstone, phosphatic and phosphate rock Mudstone Mudstone, phosphatic Phosphate rock, argillaceous Mudstone Mudstone Limestone, a rgillac e ou s Mudstone Phosphate rock Mudstone Mudstone Limestone, argillaceous Mudstone Phosphate rock, a rgillace ous Mudstone Mudstone, phosphatic Mudatone Mudstone VEM-212-47 VEM-211-47 VEM-210-47 VEM-209-47 VEM-208-47 VEM-207-47 VEM-206-47 VEM-205-47 VEM-204-47 VEM-203-47 VEM-202-47 VEM -201-47 VEM-200-47 VEM-199-47 VEM-198-47 VEM-197-47 VEM-196-47 VEM-195-47 VEM-194-47 S.8 .0 OP 4WD 40, 9S. 96 Lot no. 1206 II - Idaho 21

le Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal ses rcent oss on A1203 Fe203 F ignition c insoluble Cumulative thickness (feet) Thickness x percent P,0, (cumulatiVe) P-104 Mudstone VEM-193-47 1. Z P-103 Mudstone VEM-192-47 P-102 P-101 P-100 Mudstone; fos. col. no. 47-HW-83 Phosphate rock, argillaceous Mudstone VEY-191-47 VEM-190-47 VEM-189-47 P- 99 P- 98 P- 97 P- 96 Phosphate rock, argillaceous Mudstone, phosphatic Phosphate rock, argillaceous, and phosphatic mudstone Mudstone VEM-188-47 VEM-187-47 VEY-186-47 VEM-185-47 P- 9S Phosphate rock, argillaceous VEM -184-47 P- 94 Mudstone VEM -183-47 P- 93 Mudstone VEM -182-47 P- 92 P- 91 P- 90 Mudstone; fos. col. no. 47-HW-82 Mudstone, phosphatic and chert Mudstone VEM -181-47 LES- 329-47 LES- 328-47 9c, 3.52 P- 89 P. 88 P- 86 P- 85 Mudstone, phosphatic, contains chert nodules Mudstone Mudstone, contains chert nodules Mudstone; foil. col. no. 47-HW-81 Phosphate rock, argillaceous LES- 327-47 LES- 326-47 LES- 325-47 LES- 324-47 LES- 323-47 1,004.40 1,005.30 1,008.10 1,009.30 1,022.58 P- sit 1)- 83 !- 81 `-- 80 Mudstone, phosphatic Mudstone Mudstone, phosphatic Mudstone Mudstone and phosphate rock LES- 322-47 LES- 321-47 LES- 320-47 LES- 319-47 LES- 318-47 1,044.18 1,047.59 1,055.69 1,057.29 1,061.79 P- 79 `-- 75 Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone, calcareous Mudstone, calcareous, phosphatic LES- 317-47 LES- 316-47 LES- 315-47 LES- 314-47 LES- 313-47 1,079.07 1,091.47 1,098.75 1,106.67 1,112.48 P- 74 1)- 73 P- 72 P- 71 P- 70 Limestone, argillaceous, phosphatic Limestone, argillaceous, phosphatic Mudatone, contains Limy concretions Limestone, argillaceous Phosphate rock and calcareous mudstone LES- 312-47 LES- 311-47 LES- 310-47 LES- 309-47 LES- 308-47

Z4.7 1,121.48 1,127.86 1,134.42 1,148.28 1,151.92 Lot no. 1206. II - Idaho 22

P- 69 P- 68 P- 67 P- 66 P- 6S Mudstone, calcareous Limestone and calcareous mudstone; fos. col. no. 47-11W-80 Limestone and calcareous mudstone; fos. col. no. 47-HW-79 Chert and mudstone Mudstone, calcareous LES- 307-47 LES- 306-47 LES- 305-47 LES- 304-47 LES- 303-47 410 alb . Mb . Abb

1,162.12 1,162.66 1,163.98 1,164.83 1, 169.20 P- 64 P.- 63 P- 62 P- 61 P- 60 Mudstone Mudstone Mudstone, phosphatic Limestone Mudstone LES- 302-47 LES- 301-47 LES- 300-47 LES- 299-47 LES- 298-47 S.0 OD OP . OD OP . OD MD ODOR, - OD eV 1,169.44 1,170.88 1,175.56 1,177.10 1,184.60 P- 59 P-58 P- 57 P- 56 P. SS Mudstone, calcareous Mudstone, calcareous Mudstone Mudstone, calcareous Mudstane, contains mudstone lenses; fos. col. no. 47-HW-78 LES- 297-47 LES- 296-47 LES- 295-47 LES- 294-47 LES- 293-47 0. SS S.6 - Ob . MO MP 80. T 1,190.20 1,191.10 1,192.46 1,198. T6 1,202.83 P. 54 P- 53 P-52 P- 51 Mudstone, phosphatic, calcareous Limestone concretion in bed P-54 Mudstone, calcareous Mudstane Mudstone, calcareous, and calcareous phosphate rock LES- 291-47 LES- 292-4T LES- 290-47 LES- 289-47 LES- 288-47 (0.8) Mb MD lb. by . - Ob.. OW 4.1. OD db. - 1,220. T5 1,222.55 1,224.51 1,228.23 P-50 P- 49 P- 48 P- 47 Mudstone, calcareous; fos. col. no. 4 T-HW-77 Mudstone, calcareous, phosphatic Limestone, phosphatic, argillaceous Limestone concretion in bed P-47 Limestone, phosphatic, argillaceous LES- 287-47 LES- 286-47 LES- 285-47 LES- 284-47 LES- 283-47 (0.8) OP OD . OD . Mb.. Mb OD AD. bbi. .10 db. O. ID .1.4111b O. . Oa . 1,232.73 1,253.88 1,257.93 1,267.29 P- 46 P- 4S P.44 P. 43 Jr- 42 Mudstone, calcareous, phosphatic Mudstone, calcareous, phosphatic; fos. col. no. 47-HW-76 Limestone, argillaceous; fos. col. no. 47-HW-7S Mudstone, calcareous, phosphatic Mudstone, calcareous LES- 282-4T LES- 281-47 LES- 280-47 LES- 279-47 LES- 268-47 1. OS 11. S M.. On Ob. bb WO 1,273.04 1,282.38 1,282.88 1,286.84 1,288.44 P. 40

Mudstone, phosphatic Mudstone, phosphatic, calcareous Limestone concretion in bed P-40 Limestone concretion in bed P-40 LES- 267-4T LES- 264-47 LES- 266-47 LES- 265-47 (0.5) (0.1) 11. T OD Ob IMOD MOB Ob. Ob. OP . . Alb. ...IP m . Ob. .,. OD . 1,301.32 1,360.54 MO . Lot no. 1206. II - Idaho 23

Bed no no. Rock description Sample no. Thickness (feet) P205 Chemical anal A1203 Fe203 F es . rcent oast on ivittion r. insoluble Cumulative thickness (feet) Thickness z percent P 0,4 ( - )5 P" 38 P- 37 P- 36 Mudstone, calcareous, phosphatic Mudstone, calcareous, phosphatic Phosphate rock and calcareous mudstone Phosphate rock, contains laminations of calcareous LES- 263-47 LES- 262-47 LES- 261-47 1,367.32 1,375.18 I, 414.68 P" 35 mudstone Mudstone and phosphate rock LES- 260-47 LES- 259-47 1,437.78 1,431.26 P- 34 P"' 33 P- 32 P" 31 P- 30 Phosphate rock, calcareous Limestone, contains phosphate rock lenses Phosphate rock, calcareous Phosphate rock and mudstone; fos. col. no. 47-HW-174 Phosphate rock and phosphatic mudstone LES- 278-47 LES- 277-47 LES- 276-47 LES- 275-47 LES- 274-47 1,465.66 I, 472.22 1,485.52 1,518.18 1,529.22 P- 29 /:: 28 1' 27 P' 26 'E.- 25 Limestone Modstone, phosphatic Limestone Limestone Phosphate rock, argillaceous LES- 273-47 LES- 272-47 LES- 271-47 LES- 270-47 LES- 269-47 1,543.94 1,563.20 1,565.90 1,576.72 1,589.80 P- 24 P" 23 P- 22 I!". 21 P` 20 Phosphate rock, calcareous, and calcareous phosphatic mudstone Phosphate rock and phosphatic calcareous mudstone Phosphate rock, argillaceous Mudstone and phosphate rock Millstone LES- 248-47 LES- 247-47 LES- 246-47 LES- 245-47 LES- 244-47 O. S 0. SS ZS. 1 1,632.72 1,647.42 1,661.23 1,681.91 1,684.59 LI" 19 '-- ill P. 17 P- IL-, P- IS Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous ITEM -180-47 VEM -179-47 VEM-178-47 VEM -177-47 VEM-176-47 1,717.69 1,756.61 1,785.23 1,819.29 1,845.57 P.14 Phosphate rock and phosphatic mudstone VEM-175-47 1,855.3S P. 13 P. 12 P. 11 P- 10 Phosphate rock, argillaceous; fos. col. no. 47-HW-74 Phosphate rock, argillaceous Phosphate rock Phosphate rock RAH- 189-47 WOM - 3182 WOM - 3181 RAH- 186-47 S. 76 1,915.35 1,949.64 1,018.94 2,082.21

8 Phosphate rock Phosphate rock RAH- 185-47 RAH- 184-47 3S. 0 2,141.71 2,152.43 Lot So. 1206 . 11 - Idaho 24

P" 7 „r6 ,' 5 „P" r" Cw-1 Phosphate rock Mudstone Mudstone Limestone, argillac4bous kludstone, calcareous Phosphate rock Phosphate rock Limestone RAH- 183-47 RAH- 182-47 RAH- 181-47 RAH- 180-47 RAH- 179-47 RMC -133-47 RMC -134-47 RAH- 177-47 0.5S O. S O. S 6. S6 2,168.00 2,173.24 2,174.04 2,174.28 2,176.24 0.7S S. 66 2,209.46 2., 225.16 Wells formation Lalt no. 1204. II - Idaho 25 .

SPECTROGRAPHIC ANALYSES—TRAIL CANYON, IDAHO. LOT NO. 1206. Semi-quantitative analyses of selected samples of the phosphatic shale member of the Phosphoric formation, Trail Canyon, Idaho (see immediately preceding pages for location of section, thickness and description of strata. and chemical analyses of samples), made by U. S. Geological Survey Laboratory, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Si, Cs, Cb, Dy, Er, Eu, Ga, Gd, Au. Ho, In. Li, Lu, Nd. Pt, Pr, Rb, Sm, Sc, Ta, Te, Tb, Ti, Tm, W, and Yb were looked for in all samples but were not detected.

Explanation of symbols A more than 10 percent F 0.001-0.01 percent 8'. 1-10 percent G less than 0.001 percent D 0.1-1 percent ND not detected E 0.01-0.1 percent Bed Sample no. DO. t P-197 P-196 P- 19 S P-194 P-193 P-192 P-191 P-190 P-189 P-1118 P-187 P-186 P-185 P-184 P -183 P-182 P-181 P-180 P-179 g1111* ggg44giggg 4ggig 0 11111 1 111 KEE0 s tom foo ,, 7 iMEtiVanMil Va-N - 4. 11114.. 4.14.4.4. 1J.J.14. 1.1'111 N .1 ...I .4.4. 4.4.4 .4.4.4.4.4 ..,1

:71H Al Ba Be B Cd Ca Cr Co Cu Fe La Pb lig lin Mo Ni P Si Ag Na Sr Sn Ti if Y Zn Zr I q ViiiInq qqqq4 tWeV tg Ve riA tg M MAMMA NNNM M MA M MA MM VPIN o 00000 W oo 66do% M oo .7. S 441M4M 44%4M M MMMM M6MMMa P. 6 pi N mpimm M44%44ftiMMNi '4 4P. V sssss P° a. 0 00000 00000 00000 00000 NDEDEFDDFEAB'ODDFEEEEE NDEDEFDDFE AB'GDDFEEEEE NDFDEFDFFE AB'GDDFEEEFE .NDFDEEDEFEAB'GDDFEEEFE NDF DEEDFF E AB'GDDFEEEFE NDEDF EDEEEDAFDDFDDEEE NDEDFFDEF F AFPODDFEEFFE NDEDNDFB'EFFDB'CIDDFEENDFE NDEDFFDEF F AB'CIDDFEEFFE NDEDFFDEFF AB'CIDDFEEFFE NDEDFFDEFF AB'ODDFEEF EE NDEDFFDEEE AB'GDDNDDDF ED NDEDF FDEFE AB'ODDF EEF FE NDEDFFDEFE AB'GDDF ELF EL NDEDF FDEFF AB'ODDFEEFFE NDEDEFDFF E AB'GDDFDEEEE NDEDEFDFFE AB'GDDF EEEEE NDEDEFDEFEABIGDDFEEEEE NDEDEF D F F EB'B'GDDF DEE EE NDEDFFDEFE A AGDDFDEEEE NDEDNDF D D F EB'AGB'DF D E F ED Lot no. 1206. - Idaho 26 P-178

P-19 VEIL-180-47 BIENDNDE A DNDEDF F D F F F AB'ODDFEEFFE P-18 E D F F E AB'CIDDF E E F F VEM-179-47 EPEGFE ADNDEDF P-17 VEM-178-47 E A FED F E AIVGDDFEEF FE EDF P-16 VEM-177-47 BIENDFE PEA E AB'Ir DDFEEEEE P-15 VEM-176-47 IrENDF E ADNDEDEEDEF E AB'F DDFDEEED P-14 VEM-175-47 B'ENDEE ADNDEDEEDEF E A138 1? D D F DEEED P-13 RAH-189-47 B'ENDIPE ADNDEDEEDEFEABI F DDFDEEED P-12 WOE- 3182 BIENDF E ADNDEDEEDFF E All, GDDFEEICEE P-11 WOM- 3181 B1 ENDFF AENDEDEF D E P E AB, GDDFDEEEE P-10 RAH-186-47 B'ENDFE ADNDEDEEDFF E AB'GDDF EEEEE P9 RAH-185-47 D E ND F E A D ND E D F E D F F E AB'GDDIr E E E E E P8 RAH-184-47 B'ENDFE A D ND E D F E D F F E AlErGDDF E E E E E P7 RAH-183-47 B'ENDFE A D ND E D F E D F F E AB'Gr D D ND E E E E E P6 RAH-182-47 B'DGEEE'DNDEEINDF DE F EB'AG DDIr D D F P-SRAH-181-47 IVEGEEB'DNDEDNDFDEF ED A G D D F D E F EE P4 RAH-180-47 B'EGF EIVENDF DNDFBIDF ED AGEODF E E ND E E P3 RAH-179-47 B'DGF EB'DEEDF F DB'EB'B'AF D D E D D E E D P2 RMC-133-47 WENDFE A D ND F D E E D E F E AB'GDDFEEEEE P1 RMC-134-47 WENDITE A D ND F D E E D F F E AB'GDDF E E E E E II - Idaho 27 Lot no. 1206.

IlltzimizniaujimigilainEsAiasjatia Phosphatic shale member of Phosphoria formation sampled in two bulldozer trenches on north side of Johnson Creek, SE sec. 23, T. 8 S., R. 43 E., Caribou County, Idaho, near north end of east limb of Aspen Range anticline. Beds strike N. 10-40' W. and dip 25-45 NE. Section measured by R. M. Campbell, R. A. Gulbrandsen, R. A. Hoppin, V. E. McKelvey, and R. A. Weeks and sampled by Campbell and Weeks in September and October 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical anal ses i'm nimmi Cumulative Thickness a Bed Sample Thickness no. Rock description Loss on Aci. thickness percent P,0 no. (feet) P205 A1203 Fe , r, z 3 ignition insoluble feet cumulative Rex member of Phosphoria formation-basal beds only R- 2 Chert RAW- 73-47 R- 1 Chert and mudstone RAW- 72-47 Phos hatic shale member of Phos horia formation Mudstone RAW- 71-47 Phosphate rock, calciireous; fos. col. no. 47-HW-230/ RAW- 70-47 Mudstone RAW- 69-47 Z.6 Mudstone RAW- 68-47 Limestone, argillaceous RAW- 67-47 Mudstone; fos. col. no. 47-HW-229 RAW- 66-47 Mudstone, calcareous; fos. col. no. 47-HW-228 RAW- 65-47 Mudstone; fos. col. no. 47-HW-227 RAW- 64-47 Phosphate rock RAW- 63-47 Mudstone; fos. col. no. 47-HW-226 RAW- 62-47 Mudstone; fos. col. no. 47-HW-225 RAW- 57-47 Phosphate rock RAW- 56-47 0.63 0.46 Phosphate rock RAW- 55-47 0.53 0.41 Phosphate rock RAW- 54-47 Phosphate rock RAW- 53-47 0.82 0.50 Phosphate rock RAW- 52-47 Phosphate rock and mudstone VEM-493-47 Phosphate rock VEM-492-47 Phosphate rock VEM-491-47 Phosphate rock VEM-490-47 Phosphate rock, argillaceous VEM-489-47 Mudstone VEM-488-47 Mudstone, phosphatic VEM-487-47 Phosphate rock VEM-486-47 Phosphate rock VEM-485-47 Phosphate rock VEM-484-47 of no. 1209. II - Idaho 28

P- 93 P- 92 P.- 91 P- 90 P-89 Phosphate rock Phosphate rock Mudstone. fos. col. no. 47-HW-303 Phosphate rock, argillaceous; foe. col. no. 47-HW-302 Phosphate rock, argillaceous; fos. col. no. 47-HW-301 VEM-483-47 VEM-482-47 VEM-481-47 VEM-480-47 VEM-479-47 P- 88 P- 87 P- 86 P- 85 P- 84 Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous VEM-478-47 VEM-477-47 VEM-476-47 VEM-475-47 VEM-474-47 P- 83 P- 82 P- 81 P- 80 P- 79 Phosphate rock, argillaceous Mudstone and phosphate rock Mudstone, phosphatic Mudstone, phosphatic Mudstone, calcareous; fos. col. no. 47-HW-300 VEM-473-47 VEM-472-47 VEM-471-47 VEM-358-47 VEM-357-47 P- 78 P- 77 P- 76 P- 75 P- 74 Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 47-11W-299 Mudstone Mudstone, phosphatic Mudstone VEM-356-47 VEM-355-47 VEM-35.4-47 VEM-353-47 VEM-352-47 as. P- 73 PP- 72 P- 70 P- 69 Mudstone; foe. col. no. 47-HW-298 Phosphate rock, argillaceous Mudstone Mudstone, phosphatic Mudstone, phosphatic and chert VEM- 351-47 VEM-350-47 VEM- 349-47 VEM-348-47 VEM -347-47 SO. 1 SO. 9 P- 68 P- 67 P- 66 P- 65 P- 64 Mudstone, phosphatic Mudstone Mudstone, cherty Mudstone Mudstone and phosphate rock VEM-346-47 VEM-345-47 RMC- 90-47 RAW- 51-47 RAW- 50-47 P- 63 PP- 61 P- 60 P-59 Mudstone and phosphate rock Mudstone Mudstone Mudstone Mudstone, phosphatic RAW- 27-47 RAW- 26-47 RAW- 25-47 RAG- 1S-47 RAG- 14-47 P. 57 Mudstone, phosphatic; foe. col. no. 47-HW-297 Mudstone, phosphatic; fos. col. no. 47-HW-296 Mudstone; foe. col. no. 47-HW-295 RAG- 13-47 RAG- 12-47 RAG- 11-47 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot no. 1209. II - Idaho 29

Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal ses - rcent oss on A1203 Fe2O3 ° ignition insoluble Cumulative thickness (feet) Thickness x percent P ,0_c (cumulatiVer P- 55 Mudstone, phosphatic; fos. col. no. 47-HW-294 RAG- 10-47 P- 54 Mudstone RAG9-47 P- 53 Mudstone, phosphatic, contains chert nodules RAG8-47 P- 52 Mudstone RAG7-47 a. M. P- 51 Phosphate rock, argillaceous RAH- 216-47 P- 50 Mudstone RAH- 215-47 P- 49 Mudstone RAH- 214-47 P- 48 P- 47 P- 46 Mudstone Phosphate rock Mudstone RAH- 199-47 RAH- 198-47 RAH- 197-47 3,3 P- 45 P- 44 P- 43 P- 42 P- 41 Mudstone Mudstone; fos. col. no. 47-HW-293 Mudstone; fos. col. no. 47-HW-292 Mudstone, phosphatic Mudstone RAH- 196-47 RAH- 195-47 RAH- 194-47 RAH- 193-47 RAH- 192-47 9Z. 10 P- 40 Mudstone, phosphatic; fos. col. no. 47-HW-291 RAH- 191-47 P- 39 Phosphate rock, argillaceous; fos. col. no. 47-HW-291 RAH- 190-47 t- 38 Mudstone RAG- 24-47 r- 37 P- 36 Mudstone, phosphatic Mudstone RAG- 23-47 RAG- 22-47 1)- 35 r- 34 P- 33 t- 32 r- 31 Mudstone; fos. col. no. 47-HW-290 Phosphate rock and phosphatic mudstone Mudstone, phosphatic; fos. col. no. 47-HW-289 Phosphate rock Mudstone RAG- 21-47 RAG- 20-47 RAG- 19-47 RAG- 18-47 RAG- 17-47 1,010.06 1,033.74 1,041.10 P- 30 f- 29 r- 28 r.- 27 r- 26 Mudstone, phosphatic Mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic VEM-507-47 VEM-506-47 VEM-505-47 VEM-504-47 VEM-503-47 1,063.14 1,064.94 1,083.98 1,193.82 1,1,9.46 24 Mudstone, phosphatic Mudstone VEM-502-47 VEM-501-47 1,116.66 1,124. 66 Mudstone; fos. col. no. 47-HW-306 Mudstone Mudstone; fos. col. no. 47- H'W -305 VEM-500-47 VEM-499-47 VEM-498-47 1,131.66 1, 135.42 1,139.71 - 19 Mudstone Mudstone VEM-497-47 VEM-496-47 MO OD 1,146.37 1,148.17 Lot no. 1209. II - Idaho 30

P- 18 P- 17 P- 16 P- 15 P- 14 Mudstone, phosphatic Mudstone, phosphatic Mudstone Mudstone, phosphatic Mudstone, phosphatic VEM-495-47 VEM-494-47 RMC -111-47 RMC-110-47 RMC - 109-47 1,166.25 1,175.93 1,182.33 1,199.69 1,220.41 P- 13 P- 12 P- 11 P- 10 P9 Mudstone Mudstone, phosphatic Phosphate rock, argillaceous Mudstone and phosphate rock Mudstone, phosphatic RMC-108-47 RMC -107-47 RMC- 106-47 RMC-105-47 VEM-517-47 .111. MI1 1,223.11 1,247.42 1,272.62 1,291.86 1,302.71 PP- PP- 1'- s Phosphate rock, argillaceous Phosphate rock Mudstone, phosphatic Mudstone, phosphatic Mudstone VEM-516-47 VEM-515-47 VEM- 514-47 VEM-513-47 VEM-512-47 1,345.11 1,390.71 1,415.79 1,427.29 1,434.01 PP- P3 Mudstone Mudstone, phosphatic Phosphate rock VEM-511-47 VEM-510-47 VEM-509-47 0. OD 145. OS 1,436.53 1,440.33 1,449.26 The lower phosphate bed appears to be absent due to faulting. Wells formation CM- 1 CW- 2 Cw- 3 Dolomite; fos. col. no. 47-HW-304 Clay and phosphate rock Dolomite VEM-508-47

1,0t no. 1209. II - Idaho 31

SPECTROGRAPHIC ANALYSES—JOHNSON CREEK, IDAHO. LOT NO. 1209. Semi-quantitative analyses of selected samples of the phosphatic shale member of the Phosphoria formation, Johnson Creek, Idaho (see immediately preceding pages for location of section, thickness and description of strata, and chemical analyses of samples), made by the U. S. Geological Survey Laboratory, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Be, Bi, Cs, Co, Cb, Dy, Sm, Sc, Ts, Te, Tb, T1, Tm, W. and Yb were looked for in all samples but were not detected. Explanation of symbols A more than 10 percent F a 0.001-0.01 percent 1-10 percent' G less than 0.001 percent D 0.1-1 percent ND not detected E 0.01-0.1 percent Bed Sample no. Al Ba B Cd Ca Cr Cu Fe Ga La Pb Mg Mn Mo Ni P Si Ag Na Sr Sn Ti Y Zn Zr no. Beds P-119 through P-109 not analyzed. P-106 RAW- 56-47 P-107 RAW-55-47 P-106 RAW-54-47 P-105 RAW-53-47 P-104 RAW-52-47 P-103 VEM-493-47 P-102 VEM-492-47 P-101 VEM-491-47 P-100 VEM-490-47 P- 99 VEM-489-47 P-98 VEM-488-47 P-97 VEM-487-47 P-96 VEM-486-47 P-95 VEM-485-47 P- 94 VEM-484-47 P- 93 VEM-483-47 P- 92 VEM-482-47 P-91 VEM-481-47 P-90 VEM-480-47 P-89 VEIL-479-47 P-88 VEM-478-47 P-87 VEM-477-47 P-86 VEM-476-47 P-85 VEM-475-47 D F ND F A D F DNDENDEFNDEB'B'GDENDEDEEF DFNDF ADFDNDENDEFNDEB'B'GDENDFDEEF DFNDF ADNDDNDEEDFNDEB'BIGDEFEDEEF DFNDF A DEDNDENDEFNDEB'BIGDEF EDEEF DFNDNDADFDNDEEEFNDEB'B'GDENDEDEEF B'FFFB'DFDNDFNDEENDFB'AGDDNDEEF E F DGFFB'DFDNDFNDEENDNDB'AGDDNDEEFFF DGFFB'DFDNDFNDEENDNDB'AGDDNDEDFFF DGFFBIDFDNDENDEFNDFB'AGDDNDEDEFF B'EFFB'DFDFF F EENDFB'AGDDNDEDF EE B'EFFB'DFB'FF FEENDED AGDENDEDF EE B'EFFB'DFDFFFEENDF DAGDENDEDF E F B'F F EB'DFDNDFNDEENDFB'AGDDNDEEF E F D F F EB'DFDNDFNDEFNDFB'AGDDNDED'F E F DG F EB'DFDNDFNDEFNDFB'AGDDNDEDF E F D F F EB'DFDNDFNDEFNDEB'AGDDNDEDF E F D G F EB'DF DNDFNDEFNDFWAGDDNDEDF E F SIFF E ADEDNDEEDFNDEB'B'FDENDEDEEF B'F F E A B'F F E A SIFF E A B'F F E A B'EF E A B'EF E A D E D ND E E D F F EB'B'FDENDEDEEF DEDNDEEDF F EB'WF DENDEDEEF DEDNDF EDFNDEB'B'FDEF EDEEF DEDNDF EDFNDEB'B'FDENDEDEEF DEDNDEEDF F EB'B'FDENDEDEEF DEDNDEEDF FNDB'B'F DENDEDEEF Lot no. 1206 U- Idaho 32

P- 84 VEM-474-47 B' F FE AD P- 83 VEM-473-47 B' F F E AD Beds P-82 through P-1 not analyzed. E E D D ND ND E E E ND D F F D F F E B'. B' E B' B' F D E ND F D E ND E E D E D E E E F F 1 B' is equivalent to B and C of Bureau of Mines analyses as recorded in other reports. Lot no. 1206. U- Idaho 33

OT NO. 1211. Phosphatic shale member of Phosphoria formation sampled in two bulldozer trenches near south end of Dry Valley, NW E sec. 14, T. 9 S., R. 44 E., Caribou County, Idaho, on west limb of Schmid syncline. Beds strike N. 55 W. and dip 45* NE. Section measured by R. M. Campbell, . A. Gulbrandsen, V. E. McKelvey, H. Wedow, and R. A. Weeks and sampled by Campbell and Weeks in September and October 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Bed no. Rock description Sample no. Thickness (feet) P205 Chemical anal ses F A1203 Fe203 . - rcent ignition ci insoluble Cumulative thickness (feet) Thickness x percent PO, (cumulatfirer , Rex member of Phosphoria formation R4 R3 R2 R - Chen Chert Mudstone Chert 1020-HW 1019 -HVV 1018-HW . M. 00 ab, Phosphatic shale member of Phosphoria formati 82 Phosphate rock, argillaceous; fos. col. no. 47-HW-2881 1017-Hw ' - 80 P- 79 P- 78 Phosphate rock, argillaceous; fos. col. no. 47-HW-287 Mudstone, phosphatic Mudstone Mudstone; fos. col. no. 47-HW-286 1016-HW 1015-HW 1014-HW 1013-HW

5. Z P­ 77 P­ 76 P.. 75 P- 74 P- 73 Mudstone Mudstone Mudstone Mudstone Mudstone; fos. col. no. 47-HW-285 1012-HW 1011-HW 1010-HW 1009-HW 1008-HW P­ 72 P­ 71 P­ 70 P- 69 P- 68 Mudstone; fos. col. no. 47-HW-284 Mudstone; fos. col. no. 47-HW-283 Mudatone; fos. col. no. 47-HW-282. Mudstone Mudstone 1007-HW 1006-11W 1005-1M 1004-HW 1003-HW P­ 67 P­ 66 P­ 65 P- 64 P- 63 Phosphate rock Mudstone Mudstone; fos. col. no. 47-HW-281 Mudstone Phosphate rock 1002-HW 1001-HW RAG- 123-47 RAG- 122-47 RAG- 121-47 P­ 62 P­ 61 P.. 60 P- 59 Phosphate rock Phosphate rock Phosphate rock Phosphate rock and phosphatic mudstone RAG- 120-47 RAG- 119-47 RAG- 118-47 RAG- 117-47 ot no. 1211 II - Idaho 34

P-158 P-157 P-156 P-155 P-154 Mudstone, phosphatic Mudstone and argillaceous phosphate rock Phosphate rock Mudstone, phosphatic and phosphate rock Phosphate rock RAG- 116-47 RAG- 115-47 RAG- 114-47 RAG- 113-47 RAG- 112-47 S. 7 P-153 P-152 P-Isi Mudstone, phosphatic and phosphate rock Phosphate rock Phosphate rock Phosphate rock and phosphatic mudstone RAG- 111-47 RAW-104-47 RAG- 110-47 RMC- 96-47 (0.82) Phosphate rock RAG- 109-47 (0.45) RAG-109-47 and RAG-110-47 are logged as equi valent to RMC-96-47 and RAW-104-47. P-Iso P­I49 P-148 P-I47 P-I46 Phosphate rock and argillaceous phosphate rock Phosphate rock Mudstone, phosphatic; fos. col. no. 47-HW-280 Mudstone Mudstone, phosphatic

RMC- 95-47 RMC- 94-47 RMC- 93-47 RMC- 92-47 RMC- 91-47 P-I4s P­I44 P-143 P-I42 P­I41 Phosphate rock and phosphatic mudstone Phosphate rock and phosphatic mudstone Mudstone Phosphate rock and phosphatic mudstone Phosphate rock VEM-608-47 VEM -607-47 VEM -606-47 VEM-605-47 VEM-604-47 P-140 P-135 P-135 P-137 P-136 Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous, calcareous VEM -603-47 VEM -602-47 RMC-132-47 RMC-131-47 RMC-130-47 P-135 P-134 P-133 P-132 P­I31 Phosphate rock, argillaceous, calcareous Phosphate rock and argillaceous phosphate rock Phosphate rock Phosphate rock Mudatone, phosphatic; fos. col. no. 47-HW-279 RMC-129-47 RMC-128-47 RMC-127-47 RMC-126-47 RMC-125-47 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. L ot II - Idaho 35

Phosphate rock, argillaceous VEM-599-47 1,062.47 Mudstone, phosphatic VEM-598-47 1,070.15 Mudstone, phosphatic VEM-597-47 1,075.75 Mudstone VEM-596-47 1,079.23 Mudstone VEM-595-47 1,080. 55 Phosphate rock, mudstone, and phosphatic mudstone VEM-594-47 1,088.02 Mudstone, phosphatic VEM-593-47 1,094.74 Mudstone VEM-592-47 1,109.02 Phosphate rock, mudstone, and phosphatic mudstone VEM-591-47 1,122.52 Mudstone; fos. col. no. 47-HW-269 VEM-590-47 1,127.42 Mudstone, phosphatic VEM-589-47 1,140.16 Mudstone and argillaceous phosphate rock VEM-588-47 1,150.24 Phosphate rock and phosphatic mudstone VEM-587-47 1,159.00 Mudstone, phosphatic VEM-586-47 1,163.25 Mudstone, phosphatic and mudstone; fos. col. no. 47-HW-268 VEM-585-47 1,179.35 Phosphate rock, argillaceous, and phosphatic mudstone VEM-584-47 . 1,190.23 Mudstone; fos. col. no. 47-HW-267 VEM -583-47 1,192.66 Mudstone and phosphate rock VEM-582-47 1,205.17 Mudstone VEM -581-47 1,211.54 Mudstone VEM-580-47 1,213.01 Mudstone VEM-579-47 1,214.55 Phosphate rock, argillaceous VEM-578-47 1,221.63 Mudstone VEM-577-47 1,238.19 Mudstone and phosphate rock VEM -576-47 1,248.27 4. GO Mudstone VEM-575-47 1,249.47 Phosphate rock VEM -574-47 1,299.71 Mudstone VEM-573-47 1,305.95 Phosphate rock, argillaceous VEM -572-47 1,335.77 M. .M. 1,342.27 1,352.91 Mudstone VEM-571-47 Phosphate rock and mudstone VEM-570-47 Mudstone VEM-569-57 1,359.66 OD OW 1,366.94 Mudstone, phosphatic VEM-568-47 . OD Phosphate rock, argillaceous VEM-567-47 1,406.94 " 1,421.79 MP . Mudstone, phosphatic VEM-566-47 M. 1,424.75 Mudstone VEM-565-47 1,438.34 Phosphate rock, argillaceous VEM -564-47 1,455.62 Mudstone, phosphatic VEM-563-47 1,474.10 Phosphate rock, argillaceous VEM-562-47 . . Lot no. 1211. II - Idaho 37 .y .tor .

dChemicalanal sea Be Sample Thickness Rock description no. no. (feet) P205 A1203 Fe203 F oss on ignition insoluble Cumulative thickness (feet) Thickness a percent PO, (cumulative) P- 57 Mudatone VEM-561-47 .M. OP 1,478.30 P- 56 P- 55 Mudstone, phosphatic Mudstone VEM-560-47 RAW- 87-47 1,488.50 1,489.40 P- 54 Mudstone and chert; fos. col. no. 47-HW-266 RAW- 86-47 1,490.12 P- 53 Mudatone; fos. col. no. 47-HW-265 RAW- 85-47 1,495.56 P- 52 Mudatone RAW- 84-47 1,496.91 P- 51 P- 50 P- 49 Mudatone, phosphatic Mudatone; fos. col. no. 47-HW-264 Mudatone RAW- 83-47 RAW- 82-47 RAW- 81-47 1,504.83 1,515.75 1,516.87 P- 48 Mudstone, phosphatic RAW- 80-47 1,538.91 P- 47 P- 46 Mudstone; fos. col. no. 47-HW-263 Mudstone RAW- 79-47 RAW- 78-47 1,548.27 1,550.65 P- 45 Mudatone,phosphatic; fos. col. no.47-HW- 262 RAW- 77-47 1,560.99 P- 44 P- 43 Mudstone, phosphatic Mudstone, phosphatic RAW- 76-47 RAW- 75-47 1,588.87 1,595.37 P- 42 Mudatone RAW- 74-47 1,597. OS P- 41 P- 40 P- 39 P- 38 Mudatone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Phosphate rock, argillaceous VEM-559-47 ' VEM 558-47 VEM-557-47 VEM-556-47 1,625.85 1,648.29 1,678.19 1,695.92 P' 37 P' 36 P- 3S P- 34 P- 33 Phosphate rock, argillaceous Phosphate rock and mudstone Phosphate rock Phosphate rock and mudstone Phosphate rock Lind mudstone VEM-555-47 VEM 554-47 VEM-553-47 VEM-552-47 VEM-551-47 1,710.48 1,733.38 1,780.72 1,821.67 1,858.56 P- 32 P- 31 P- 30 Pi,- 29 ''' 28 Mudatone, phosphatic Mudatone, phosphatic; fos. col. no. 47-W-261 Mudstone, phosphatic Mudstone, phosphat4 Mudstone, phosphatic VEM-550-47 VEM-549-47 VEM-548-47 VEM-547-47 VEM-546-47 " I, 872.86 1,892.06 1,911.38 1,933.14 1,950.99 P's 27 Mudatone, phosphatic; fos. col. no. 47-HW-260 VEM-545-47 1,962.33 P- 26 P. 25 L" P Limestone, argillaceous Mudstone. calcareous Phosphate rock, argillaceous Phosphate rock, argillaceous VEM-544-47 VEM-543-47 VEM-542-47 VEM-541-47 Z5.5 Z.4 1,964.13 1,968.73 2,021.75 Z. 065.10 P. , P.. -2 Phosphate rock, argillaceous Mudatone, phosphatic VEM-540-47 VEM-539-47 2,077.34 2,083.34 Lot no. 1211. II - Idaho 38

P- 20 P- 19 P- 18 P- 17 P- 16 Mudstone, phosphatic Mudstone Phosphate rock, argillaceous; fos. col. no. 47-HW-247 Phosphate rock Phosphate rock VEM-538-47 VEM-537-47 VEM-536-47 VEM-535-47 VEM- 534-47 Z. 30 2,100.26 2,102.78 2,151.56 2,200.18 2,255.47 P- 15 P- 14 P- 13 P- 12 P- 11 Mudstone, phosphatic Phosphate rock, argillaceous Mudstone, phosphatic Phosphate rock, argillaceous; fos. col. no. 47-HW-246 Phosphate rock, argillaceous VEM-533-47 VEM-532-47 VEM-531-47 VEM-530-47 VEM-529-47 2,261.87 2,280.70 2,288.65 2,347.45 2,364.57 P- 10 P­ P­ P­ P­ Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock VEM-528-47 VEM-527-47 VEM -526-47 VEM-525-47 VEM-524-47 2,417.69 2,456.93 2, 500. 74 2,573.45 P­ P­ P­ P­ P-1 Phosphate rock, argillaceous Mudstone Mudstone Phosphate rock Phosphate rock and mudstone VEM -523-47 VEM-522-47 VEM -521-47 VEM-520-47 VEM-519-47, 2,598.85 2,602.75 2,605.75 2,625.97 2,641.69 Dolomite; fos. col. no. 47-AW-244 Phosphate rock Dolomite; fos. col. no. 47-AW-245 VEM-518-47 Wells formation - Lot no. 1211. II - Idaho 39

WEST DAIRY, IDAHO. LOT NO. 1208. Phosphatic shale member and part of Rex member of Phosphoria formation sampled in bulldozer trench near SE corner of NEISEt sec. 19, T. 9 S., R. 44 E., Caribou County, Idaho, on west limb of Dairy syncline. Beds strike N. 64' W. and dip 85' NE. Section measured by F. C. Armstrong, V. E. McKelvey, L. E. Smith, and R. A. Weeks and sampled by 0. A. Payne and R. A. Smart in September 1947. Samples analyzed by U. S. Bureau of Mtnes Laboratory, Albany, Oregon. Chemical anal ses rcent Cumulative Thickness x Bed Sample Thickness Rock description Loss on thickness percent P O rico. no. (feet) P205 A1203 Fe -0 z 3 ignition insoluble (feet) (cunuilatilfe) Rex member of Phosphoria formation-basal beds only R4 Mudstone and chert; fos. col. no. 47-HW-139/ FCA- 267-47 Ft' 3 Chert FCA- 268-47 R2 Mudstone and chert FCA- 269-47 R1 Chert, phosphatic FCA- 270-47 Phosphatic shale member of Phosphoria formation P­ 93 Mudstone, phosphatic FCA- 271-47 P- 92 Mudstone FCA- 272-47 Mudstone, phosphatic FCA- 273-47 Mudstone FCA- .181-47 P- 89 Mudstone; fos. col. no. 47-HW-140 FCA- 280-47 P­ 88 Mudstone, fos. .col. no. 47-HW-141 FCA- 279-47 P­ 87 Mudstone; fos. col. no. 47-HW-142 FCA- 278=47 P­ 86 Mudstone FCA- 277-47 P-1 85 Mudstone, phosphatic FCA- 276-47 P-184 Mudstone FCA- 275-47 P­ 83 Phosphate rock, argillaceous FCA- 274-47 P-182 Phosphate rock RAW1-47 P. 81 Mudstone RAW2-47 P- 80 Mudstone; fos. col. no. 47-HW-143 RAW3-47 P. 79 Mudstone RAW4-47 P-1 78 Mudstone; fos. col. no. 47-HW-144 RAW5-47 P- 77 Phosphate rock RAW6-47 P- 76 Mudstone RAW7-47 P. 75 Mudstone; fos. col. no. 47-HW-145 RAW8-47 P. 74 Phosphate rock RAW9-47 P-173 Phosphate rock RAW- 10-47 P P.172 Phosphate rock RAW- 11-47 P-1 Phosphate rock RAW- 12-47 70 Mudstone, phosphatic RAW- 13-47 P-169 Phosphate rock, argillaceous RAW- 14-47 Lot no. 1208. II - Idaho 40

P-168 P-167 P-166 P-16S P-164 Phosphate rock, argillaceous Phosphate rock Phosphate rock and phosphatic mudstone Phosphate rock Phosphate rock and argillaceous phosphate rock RAW- 15-47 RAW- 16-47 RAW- 17-47 VEM-304-47 VEM-303-47 P-163 P-162 P-161 P-160 P-159 Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous Mudstone, phosphatic Phosphate rock and phosphatic mudstone VEM-302-47 VEM-301-47 VEM-300-47 VEM-299-47 VEM-298-47 P-158 P-157 P-156 P-155 P-154 Phosphate rock, argillaceous and phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock VEM-297-47 VEM-296-47 VEM-295-47 VEM-294-47 VEM-293-47 P-153 P-152 P-ISI P-150 P-149 Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous; fos. col. no. 47-HW-146 Phosphate rock, argillaceous RAG- 131-47 RAG- 130-47 RAG- 129-47 RAG- 128-47 RAG- 127-47 P-148 P-147 P-146 P-145 P-144 Mudstone, phosphatic Mudstone, phosphatic Mudstone Mudstone Mudstone, phosphatic; fos. col. no. 47-HW-175 RAG- 126-47 RAG- 125-47 RAG- 108-47 RAG- 107-47 RAG- 124-47 P-143 P-141 P-140 P-139 Mudstone, phosphatic Mudstone Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 47-HW-147 Mudstone RMC- 89-47 RMC- 88-47 RMC- 87-47 RUC- 86-47 RMC- 85-47 OD GO MP MI O. AM 11,10, SO. 72 P-138 Mudstone, phosphatic RMC- 84-47 P-137 Mudstone RMC- 83-47 P-136 Mudstone, phosphatic RMC- 82-47 P-135 752.53 Mudstone, phosphatic VEM- 310-47 P-13,4 Mudstone VEM-309-47 P-133 Mudstone VEM-308-47 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot no. 1208. II - Idaho 41

Bed no. Rock description Sample no. Thickness (feet) P2O5 Chemical anal - ses . - rcent Loss on Alz03 FezO3 ignition insoluble Cumulative Thick (feet) Thickness a pe rcent P O , c (cumulatifer '129 Mudstone Mudstone Mudstone Mudstone, phosphatic Phosphate rock, argillaceous VEM-307-47 VEM-306-47 VEM-305-47 RAG- 138-47 RAG- 137-47 Z. 2

Mudstone, phosphatic Mudstone Mudstone and phosphatic mudstone Mudstone; fos. col. no. 47-HW-148 Mudstone RAG- 136-47 RAG- 135-47 RAG- 134-47 RAG- 133-47 RAG- 132-47 836,00 Mudstone, phosphatic; fos. col. no. 47-HW-149 Mudstone Mudstone, phosphatic; fos. col. no. 47-HW-150 Mudstone, phosphatic; fos. col. no. 47-HW-150 Mudstone, phosphatic Mudstone; fos. col. no. 47-HW-151 Mudstone, phosphatic Mudstone Mudstone Mudstone RAW- 24-47 RAW- 23-47 RAW- 22-47 RAW- 21-47 RAW- 20-47

RAW- 19-47 RAW- 18-47 FCA- 288-47 FCA- 287-47 FCA- 286-47 81,30 Mudstone, phosphatic Mudstone Mudstone Muds tone Phosphate rock, argillaceous FCA- 285-47 FCA- 284-47 FCA- 283-47 FCA- 282-47 RMC- 81-47 Mudstone Phosphate rock, argillaceous Phosphate rock, argillaceous Mudstone, phosphatic Mudstone; fos. col. no. 47-HW-136 RMC- 80-47 RAG- 106-47 RAG- 105-47 RAG- 104-47 RAG- 103-47 Mudstone, phosphatic Mudstone Phosphate rock Mudstone and phosphatic mudstone Phosphate rock RAG- 102-47 RAG- 101-47 RAG- 100-47 RAG- 99-47 VEM-288-47 1,016.17 1, C23. 91 1,054.06 '' 97 Mudstone Mudstone and phosphate rock Phosphate rock, cherty VEM-287-47 VEM-286-47 VEM-285-47 1,057.48 1,065.96 1,069.47 Lot no. 1208. II - Idaho 42

P- 94 P- 93 P- 92 P- 91 P- 90 Phosphate rock, sandy; fos. col. no. 47-HW-135 Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 47-HW-137 Mudstone, phosphatic and phosphate rock; fos. col. no. 47-HW-134 Mudstone and phosphatic mudstone RMC- 75-47 RMC- 74-47 RMC- 73-47 RMC- 72-47 RMC- 71-47 1,080.67 1,086.83 1,095.11 1,098.02 1,102.22 /3- 89 Pirs" 88 P. 87 P- 86 P. 85 Mudstone, phosphatic Mudstone Mudstone Mudstone and phosphatic mudstone Phosphate rock, argillaceous RMC- 79-47 RMC- 78-47 RMC- 77-47 RMC- 76-47 FCA- 266-47 1,104.37 1,106.32 I, 106.96 1,114.66 1,135.54 P- 84 P- 83 f: 82 P- 81 ' 80 Mudstone, phosphatic Mudstone, phosphatic Mudstone Phosphate rock, argillaceous Phosphate rock, argillaceous FCA- 265-47 FCA- 264-47 FCA- 263-47 FCA- 262-47 FCA- 261-47 1,141.59 1,155.18 1,159.41 1,165.49 1,173.37 Pt.- 79 '' 78 !- 77 g-- 76 P- 75 Mudstone, phosphatic Mudstone, phosphatic; fos. col. no. 47-HW-133 Mudstone Mudstone Chert FCA- 260-47 FCA- 2.59-47 RAG- 98-47 RAG- 97-47 RAG- 96-47 1,198.03 1,214.51 1,220.01 1,220. IS 1,220.40 P- 74 P: 73 ,„'" 72 P- 71 P- 70 Mudstone Mudstone Mudstone Mudstone Mudstone RAG- 95-47 RAG- 94-47 RAG- 93-47 RAG- 92-47 RAG- 91-47 1,221.72 1,224.80 1,231.10 1,233.92 I, 235.68 P- 69 P- 68 P- 67 P- 66 P- 65 Mudstone and phosphate rock Mudstone and phosphate rock Mudstone; fos. col. no. 47-HW-132 Mudstone Mudstone, phosphatic RMC- 70-47 RMC- 69-47 RMC- 68-47 RMC- 67-47 RMC- 66-47 1,237.89 I, 244.29 1,248.77 1,250.97 1,255.32 P. 64 P- 63 P" 62 P- 61 P- 60 Mudstone Mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone RMC- 65-47 RMC- 64-47 FCA- 258-47 FCA- 257-47 FCA- 256-47 1,256.52 I, 256.94 1,271.73 1,288.53 1,292.44 Pp 59 PP-57 r.. 55 Mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic FCA- 255-47 FCA- 254-47 FCA- 253-47 FCA- 252-47 FCA- 251-47 1, 296.36 1,300.71 1,311.71 1,341.91 I, 354.56 01 no. 1208 II - Idaho 43

P. P­ P­ PP- P­ PP P P P P P P P P P P P P. P. P­ PP. P­ P. P. P. P. P. P. P.

Rock description Sample no. Thickness (feet) P205 Chemical anal sea rcent oss on A1203 Fe203 ignition insoluble Cumulative thickness (feet) Thickness x percent PAP& (cumulatifer Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic

VEM-284-47 VEM-283-47 VEM-282-47 VEM-281-47 VEM-280-47 1,371.22 1,384.86 1,406.91 1,429.31 1,456.31 Phosphate rock, argillaceous Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous VEM-279-47 VEM-278-47 VEM-277-47 VEM-276-47 VEM-275-47 1,475.75 1,498.23 1,520.21 1,537.86 1,546.14 Phosphate rock and mudstone Phosphate rock Phosphate rock Phosphate rock and mudstone Phosphate rock LES- 225-47 LES- 424-47 LES- 423-47 LES- 422-47 LES- 421-47 1,560.09 1,575.89 1,602.69 1,626.69 1,662.11 Mudstone, phosphatic, and argillaceous phosphate rock phosphate rock and phosphatic mudstone Mudstone, phosphatic Mudstone, phosphatic Mudstone, phosphatic LES- 420-47 LES- 419-47 LES- 418-47 LES- 417-47 LES- 416-47 1,677.06 1,687.71 1,695.09 1,705.35 1,735.71 Mudstone, phosphatic; fos. col. no. 47-HW-131 LES- 415-47 1,740.39 Mudstone, phosphatic Mudstone, phosphatic Mudstone Mudstone, phosphatic LES- 414-47 LES- 413-47 LES- 412-47 LES- 411-47 1,749.75 1,754.82 1,756.17 1,760.73 Phosphate rock and mudstone; fos. col. no. 47-HW-138 Phosphate rock and mudstone Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous RMC- 63-47 RUC- 62-47 RMC- 61-47 FCA- 250-47 FCA- 249-47 1,780.71 1,818. U 1,840.43 1,850.67 1,875.15 Mudstone, phosphatic Phosphate rock Phosphate rock, argillaceous Phosphate rock Mudstone, phosphatic FC A- 248-47 FCA- 247-47 FCA- 246-47 RAG- 90-47 RAG- 89-47 1,893.61 1,928.65 1,956.65 2,006.65 2,019.94 /7 Phosphate rock and mudstone Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock, argillaceous RAG- 88-47 RAG- 87-47 RAG- 86-47 RAG- 85-47 2,049.94 2,087.59 2,101.21 2,113.96 Lot no. 1208. II - Idaho 44

MONTPELIER CANYON, IDAHO. LOT NOS. 1207 AND 1236. Phosphoria formation measured and sampled in hand trenches on westward-dipping fault block, northwest side of Montpelier Canyon three miles east of Montpelier, sec. 31, T. 12 S., R. 45 E., Bear Lake County, Idaho. Most of section (lot no. 1207) measured in long trench, exposing strata that strike N. 18° E. and dip 29' W., by F. C. Armstrong, R. M. Campbell, R. A. Gulbrandsen, and R. A. Hoppin and sampled by Campbell, 0. A. Payne, R. A. Smart, and R. S. Sears during August 1947. Lower part of phosphatic shale (lot no. 1236) measured in two trenches 425 feet to the southwest exposing strata that strike N. 32' E. and dip 30' NW., by R. A. Gulbrandsen and R. P. Sheldon and sampled by R. A. Smart in September 1948. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical anal ses - rcent Cumulative Thickness x Bed Sample Thickness no. Rock description Loss on A thickness percent P,O, no. (feet) P205 A1203 Fe2O3 F ignition insoluble (feet) (cumulatiter Dinwoody formation-lot no. 1207 I'd- 1 Limestone, argillace us; fos. col. no. 47-HW-187 o RAH-242-47 Upper shale member of Phosphoria formation-lot no. 1207 U. 12 Chert, phosphatic; fos. col. no. 47-HW-186 RAH-243-47 1J- 11 Limestone, argillaceous RAH-244-47 1J- 10 Mudstone, calcareous RAH-245-47. 11" 7, Mudstone RAH-246-47 '' 8 Mudstone RAH-247-47 „Us Mudstone RAH-248-47 Limestone, argillaceous RAH-249-47 U- Tr Mudstone RAH-250-47 7?'" 4 Limestone, argillaceous RAH-251-47

"" Chert RAH-252-47 II2 Chert, calcareous RAH-253-47 U1 Mudstone RAH-254-47 Rex member of Phosphoria formation-lot no. 1207 Limestone, cherty; fos. col. no. 47-HW-185 RAH-255-47 Limestone, cherty; fos. col. no. 47-11W-184 RAH-256-47 R- 2 Chert, calcareous; fos. col. no. 47-NW-183 RAH-257-47 R- 2 Chert, calcareous RAH-258-47 Chert, calcareous RAH-259-47 R- 2 Chert, calcareous RAH-260-47 R- 21 Chert, calcareous RAH-261-47 Lot no. 1207 and 1236. U - Idaho 46

0 Chert, calcareous RAH-262-47 9 Chert, calcareous RAH-263-47 18 Limestone, cherty RAH-264-47 7 Limestone, cherty RAH-265-47 6 Chert, calcareous RAH-266-47 5 Limestone, argillaceous RAH-267-47 4 Chert and limestone RAH-268-47 3 Chert, calcareous RAH-269-47 2 Chert and limestone RAH-270-47 Limestone and chert RAH-271-47 0 Limestone and chert; fos. col. no. 47-HW-182 RAH-272-47 9 Chert, calcareous RAH-273-47 7 Chert and limestone RAH-275-47 -, 6 Limestone and chert RAG- 51-47 8 Limestone and chert RAH-274-47 5 Chert, calcareous RAG- 64-47 4 Chert RAG- 63-47 3 Limestone, cherty RAG- 62-47 2 Limestone, argillaceous FCA- 209-47 Chert, calcareous FCA-210-47 o o horia for_ation -lot nos. 1207 and 1236 Lot no. 1207 .8 Phosphate rock, argillaceous FCA-211-47 7 Mudstone, calcareous; fos. col. 6 Mudstone; fos. col. no. no. 47-HW-65 FCA-212-47 47-HW-68 FCA-213-47 5 Mudstone, calcareous FCA-214-47 31. IZ 4 Mudstone FCA-215-47 Mudstone FCA-216-47 2,8 8. Y Mudstone FCA -217-47 Mudstone, calcareous FCA-208-47 0 Mudstone, calcareous; fos. col. no. 47-HW-67 FCA-207-47 9 Mudstone, calcareous; fos. col. no. 47-HW-66 FCA-206-47 8 Limestone; fos. col. no. 47-HW-69 FCA-205-47 7 Phosphate rock, argillaceous FCA-204-47 SY. 47 6 Mudstone, calcareous FCA-203-47 S Mudstone, calcareous FCA-202-47 Mudstone FCA-201-47 Muds tone FCA-188-47 Mudstone FCA-187-47 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Lot nos. 1207 and 1236 - Idaho 47

Bed no. Rock description Sample no. Thickness (feet) P2O5 Chemical anal ses A1203 Fe2O3 F . - rcent oss on ignition insoluble Cumulative thickness (feet) Thickness x percent P0, (curnulatifer P-15 P-14 P-14 P-14 Limestone, argillaceous; fos. col. no. 47-HW-70 Mudstone, calcareous Phosphate rock Phosphate rock Phosphate rock FCA-200-47 FCA-199-47 FCA-198-47 FCA-197-47 FCA-196-47

P-146 P-145 P-144 P-143 P-142 Limestone, phosphatic Phosphate rock Phosphate rock, argillaceous Mudatone, calcareous Phosphate rock, argillaceous FCA-195-47 FCA-194-47 FCA-193-47 FCA-192-47 FCA-191-47 P-141 P-14o P-139 P-138 P-137 Limestone, argillaceous; fos. col. no. 47-HW-181 Mucistone, phosphatic Limestone, argillaceous; fos. col. no. 47-HW-180 Phosphate rock big udstone, calcareous FCA-190-47 FCA-189-47 FCA-165-47 FCA-164-47 FCA-163-47 SS. 9 P-136 P-13S P-134 P-13; P-132 Phosphate rock Limestone Phosphate rock Phosphate rock, argillaceous Phosphate rock FCA-162-47 FCA-161-47 FCA-160-47 FCA-159-47 FCA-113-47 P-131 P-130 P.1Z9 P-127 Phosphate rock Phosphate rock Phosphate rock, argillaceous Phosphate rock Phosphate rock, calcareous, argillaceous FCA-112-47 FCA-147-47 FCA-146-47 FCA-145-47 FCA- 49-47 S.8 P-1z6 p-i25 P-124 P-123 P-122 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock FCA- 50-47 FCA- 51-47 FCA- 52-47 FCA-553-47 FCA- 54-47 P-I21 P-120 P-119 P-116 P-117 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock FCA- 64-47 FCA- 64-47 FCA- 66-47 FCA- 67-47 FCA- 68-47 I. Z P­/16 P-115 P-114 Phosphate rock Phosphate rock Phosphate rock, argillaceous FCA- 69-47 FCA-148-47 FCA-149-47 Lot nos. 1207 and 1236. II - Idaho 48

P-113 P-112 P-111 P-110 P-109 Phosphate rock, calcareous, argillaceous Phosphate rock Phosphate rock, argillaceous Mudstone Mudstone, phosphatic FCA-150-47 FCA-151-47 RAG- 25-47 RAG- 26-47 RAG- 27-47 P-108 P-107 P-106 P-105 P-104 Mudstone, phosphatic Mudstone Mudstone Mudstone Phosphate rock; fos. col. no. 47-HW-179 RAG- 28-47 RAG- 29-47 RAG- 30-47 RAG- 31-47 RAG- 32-47 P-103 P-102 P-Iol P-Ioo P- 99 Mudstone, phosphatic, calcareous Mudstone, phosphatic, calcareous Mudstone, phosphatic Phosphate rock, argillaceous Mudstone RAG- 33-47 RAG- 34-47 RAG- 35-47 RAG- 36-47 RAG- 37-47 OD OD P- 98 P. 97 P- 96 P- 95 P- 94 M udstone, phosphatic Mudstone; fos. col. no. 47-HW-178 Phosphate rock, argillaceous; fos. col. no. 47-HW-177 Mudstone, phosphatic, calcareous Mudstone, phosphatic, calcareous RAG- 38-47 RAG- 39-47 RAG- 40-47 RAG- 41-47 RAG- 42-47 Ob . P- 93 P- 92 P- 91 P- 90 P- 89 Phosphate rock, calcareous Phosphate rock, argillaceous Phosphate rock and phosphatic mudstone Mudstone, phosphatic Phosphate rock, argillaceous RAG- 43-47 RAG- 44-47 RAG- 45-47 RAG- 46-47 RAG- 47-47 .10 OD OD AO Ob. P­ 88 P.-87 P- 86 P- 85 P- 84 Phosphate rock Mudstone Phosphate rock Limestone, argillaceous Phosphate rock RAG- 48-47 RAG- 49-47 RAG- 50-47 RAG- 52-47 RAG- 63-47 1,054.24

P- 83 P- 82 P- 81 P- 80 Limestone concretion in bed P-84 Phosphate rock, argillaceous Phosphate rock, argillaceous Mudstone, calcareous Phosphate rock RAG- 54-47 RAG- 55-47 RAG- 56-47 RAG- 57-47 RAG- 58-47 (0.0-1.2) OD OW din SD in. AD OP. 1,064.69 1,089.09 1,090.49 1,150.55 Lot nos. 1207 and 1236. II - Idaho 49 fek

Rock description Sample no. Thickness (feet) P205 Chemical anal ses A1203 Fe203 F . - rcent Loss on ignition ci insoluble Cumulative thickness (feet) Thickness x percent PO, (cumulatiifer 1_0 Limestone, argillaceous Phosphate rock, argillaceous, calcareous Mudstone, phosphatic Mudstone, phosphatic, calcareous Mudstone, calcareous, phosphatic RAG- 59-47 RAG- 60-47 RAG- 61-47 RAG- 65-47 RAG- 66-47 1,158.49 1,197.49 1,212.33 1,234.73 1,275.63 PP­ P. P74 Limestone Limestone, phosphatic, argillaceous Phosphate rock, calcareous Phosphate rock, calcareous Phosphate rock, calcareous RAG- 67-47 RMC- 22-47 RMC- 21-47 RMC- 20-47 RMC- 19-47 1,277.38 1,286.76 1,319.57 1,330.77 I, 355.74 PP­ P. Phosphate rock, argillaceous, calcareous Phosphate rock Phosphate rock Phosphate rock Phosphate rock, calcareous RMC- 18-47 RAG- 76-47 RAG- 75-47 RAG- 74-47 RAG- 73-47

1,362.40 I, 394.30 1,457.10 1,503.35 1,509.71 64 Limestone RAG- 72-47 1,512.18 Limestone concretion in bed P-63 and lower part of bed P-64 Phosphate rock, calcareous; fos. col. no. 47-HW-176 Mudstone, calcareous, phosphatic Limestone RAG- 71-47 RAG- 70-47 RAG- 69-47 RAG- 68-47 (0.0-3.0) 1,570.68 1,573.52 1,574.74 P. P­ P. P60 S7 Limestone Limestone Limestone Limestone, argillaceous Limestone RMC- 16-47 RMC- 15-47 RMC- 14-47 RMC- 13-47 RMC- 12-47 ... es. 1,575.04 1,575.67 1,576.63 1,576.83 1,577.07 P­

P. Limestone Limestone, argillaceous Mudstone, calcareous RMC- 11-47 FCA-228-47 FCA-227-47 1,577.79 1,578.78 Limestone concretion in bed P-53 Mudstone FCA-226-47 FCA-225-47 (0.0-1.2) Z. 7 1,582.71 P. 51 SO Mudstone Mudstone FCA-224-47 FCA-223-47 1,586.71 1,594.45 II - Idaho 50 t nos. 1207 and 1236.

P- 49 P- 48 P- 47 Limestone concretion in bed P-49 Mudstone, calcareous, phosphatic Limestone concretion in bed P-48 Mudstone, phosphatic, calcareous Limestone; fos. col. no. 47-11W-71 FCA-222-47 FCA-221-47 FCA-220-47 FCA-219-47 FCA-218-47 (0.0-0.35) (0.0-0.45) 1,603.81 1,616.13 1,619.09 P.- 46 P. 45 P- 44 P- 43 Phosphate rock, calcareous, argillaceous Limestone concretion in bed P-46 Limestone, argillaceous, phosphatic Mudstone, calcareous, phosphatic Phosphate rock, calcareous, argillaceous FCA-158-47 FCA-157-47 FCA-156-47 FCA-155-47 FCA- 1 54-47 (0.0-1.0) 1,639.37 1,648.06 1,661.64 1,673.72 P- 42 P- 41 P- 40 P- 39 P- 38 Limestone, phosphatic, argillaceous Phosphate rock and calcareous mudstone Limestone Mudstone, phosphatic Mudstone, phosphatic FCA-153-47 FCA-152-47 FCA- 63-47 FCA- 62-47 FCA- 61-47 1,680.02 1,690.59 1,691.83 1,700.43 1,707.03 P- 37 P- 36 P.- 35 P- 34 Mudstone, phosphatic Mudstone, phosphatic Limestone, phosphatic, argillaceous Limestone concretion in bed P-34 Limestone, phosphatic, argillaceous FCA- 60-47 FCA- 59-47 FCA- 58-47 FCA- 57-47 FCA- 56-47 (0.0-0.8)

1,711.73 1,720.88 1,728.80 1,738,70 P- 33 P- 32 P- 31 P- 30 P Limestone, phosphatic, argillaceous Limestone, phosphatic, argillaceous Mudstone, phosphatic, calcareous Phosphate rock, calcareous Phosphate rock, calcareous FCA- 55-47 FCA-186-47 FCA-185-47 FCA - 184-47 FCA - 183-47 0.3S .11b 1,752.00 1,756.51 1,764.25 1,781.65 1,795.49 P- 28 P- 27 P- 26 Limestone, phosphatic Mudstone, calcareous, phosphatic Phosphate rock FCA-182-47 FCA-181-47 FCA-180-47 1,801.14 1,832.66 Lots 1207 and 1236. II - Idaho 51

emical anal ses rcent Cumulative Thickness a Bed Sample Thickness Rock description oss on thickness percent P,O, no. no. (feet) P205 A1203 Fe2O3 F ignition insoluble (feet) (cumulatiVer P- 25 Limestone FCA-179-47 1,833.85 P- 24 Phosphate rock, argillaceous FCA-178-47 1,840.46 P- 23 Limestone, argillaceous FCA-177-47 1,846.92 P- 22 Mudstone, phosphatic FCA-172-47 1,871.88 PMudstone, calcareous FCA-171-47 1,877.32 Mudstone, phosphatic FCA-170-47 1,886.02 At the north trench (lot no. 1207) the strata at the base of the phosphatic shale are in fault contact with the underlying Wells formation. The strata at the south trenches (lot no. 1236) were measured and sampled to complete the information on this interval. Correlation between the trenches was based on a nodular zone below samples 3053-RPS and FCA-169-47. Lot no. 1236 P- 19 Limestone, argillaceous 3053-RPS 1,893.58 P- 18 Phosphate rock and mudstone 3052-RPS 1,969.10 P- 17 Phosphate rock and mudstone 3051- RPS 1,995.83 P- 16 Limestone, argillaceous 2859- RPS 2,001.53 Limestone lens in bed P-15 (0. 0-1.2) P- 15 Phosphate rock and mudstone 2858- RPS 2,076.41 P- 14 Phosphate rock 2857- RPS 2,137.35 P- 13 Phosphate rock, argillaceous, calcareous 2856- RPS Z, 178.63 P- 12 Phosphate rock, argillaceous 2855- RPS 2,249.45 P- 11 Limestone 2854- RPS 2,233.53 P- 10 Phosphate rock, argillaceous, calcareous 2853- RPS 2,259.53 P Phosphate rock, argillaceous, calcareous 2852- RPS 2,274.57 PPhosphate rock, calcareous, argillaceous 2851- RPS 2,286.68 Limestone lens, argillaceous in .. OD bed P-7 2850- RPS (0.0-1.5) P- 7 Limestone 1106-RAG 2,295.86 P' 6 Phosphate rock 1105-RAG 2,402.62 P. 5 Phosphate rock 1104-RAG 0.58 0.48 2,480.86

4 Mudstone, calcareous 1103-RAG 2,482. 48 P.. 3 IN, .. Limestone, argillaceous 1102-RAG 2,493.40 P. 2 G. ON, liudstone, calcareous 1101-RAG 2,497.72 Phosphate rock 1100-R 2,511.16 Lot no. 1207 P. 12 Limestone, argillaceous; fos. col. .M1 no. 47-HW-64 FCA-169-47 (2.2) Lot nos. 1207 and 1236. II-Idaho-52

FCA-169-47 is equivalent to 3053-RPS of lot no. 1236. P- 11 P- 10 p9 P8 Phosphate rock Mudstone concretion in bed P-10 Phosphate rock, argillaceous Phosphate rock Limestone, phosphatic; fos. col. no. 47-HW-63 FCA-168-47 FCA-167-47 FCA-166-47 RAH-176-47 RAH-175-47 (1.4) (0.0-0.4) (1.05) (0.9) (0.7) OP M. .11., PP- PP- Phosphate rock, argillaceous Limestone concretion in bed P-7 Phosphate rock, argillaceous Mudstone, calcareous Limestone, argillaceous RAH-174-47 RAH-173-47 RAH-172-47 RAH-171-47 FCA-173-47 (1.0) (0.0-0.7) 0.6) 0.35) 1.0) P­ P­ P-1 Limestone Phosphate rock Limestone, phosphatic FCA- 174-47 FCA-175-47 RAG- 77-47 0.15) 0.25) 0.5) 3Z. 3 RAG-77-47 lies in fault contact with FCA-176-47 at the top of the Wells formation. Wells formation-top beds only Cw- 1 Cw- 2 Cw- 3 Cw- 4 Cw- 5 Limestone; fos. col. no. 47-HW-62 Limestone Chert Quartzite Quartzite, chert, and limestone FCA-176-47*

Cw- 7 n ,-111,- 8 SW' 9 k-7W-10 Quartzite Quartzite Quartzite Quartzite, limestone, and chert Quartzite and limestone

Cw-11 Cw-12. CW-13 CW-14 Quartzite and limestone Quartzite and chert Quartzite, calcareous Sandstone and mudstone 11. S Lot nos. 1207 and 1236. II-Idaho-S3

SPECTROGRAPHIC ANALYSES—MONTPELIER CANYON, IDAHO. LOT NO. 1207. Semi-quantitative analyses of two samples of phosphatic shale member of Phosphoria formation, Montpelier Canyon„ Idaho (see immediately preceding pages for location of section, thickness and description of strata, and chemical analyses of samples), made by U. S. Bureau of Mines Laboratory, Albany, Oregon. In addition to the elements listed in the table below, Sb, As, Be, Bi, Cd, Co, Cb, Ga, Au, Li, Hg, Pt, Ta, Sn, W, and Zn were looked for but were not detected. Explanation of symbols A more than 10 percent E 0.01-0.1 percent B 5-10 percent F 0.001-0.01 percent C 1-5 percent G a less than 0.001 percent D 0.1-1 percent ND not detected Bed no. Sample no. Al Ba B Ca Cr Cu Fe Pb Mg Mn Mo Ni Si Ag Na Sr Ti Zr P-132 FCA-113-47 D E F A E G D E D F F F G E E E D F P-131 FCA-112-47 DE F A E G D ND D F ND F G E E E D F Lot no. 1207. II-Idaho-54