Stratigraphic sections of the Phosphoria formation in Wyoming

McKelvey, V.E., Smith, L.E., Hoppin, R.A., Armstrong, F.C. · 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 Wyoming, 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 WYOMING by V. E. McKelvey, L. E. Smith, R. A. Hoppin, and F. C. Armstrong wA$HING7.044u, , MINERAL DEPOSITS BRANCH Spokane, Washington July 1951 eOPEN FILE This is preliminary and has not ?d for conformity been edited or Survey standards with U. S. and nomenclature.

TABLE OF CONTENTS Page Int'oduction Abstract of sections Layland Canyon. Lot no. 1202. lw Spectrographic analyses 5w Coal Canyon. Lot no. 1201. 7w Additional analyses 12w Additional analyses of selected samples 16w Spectrographic analyses 17w North Fork of Pine Creek. Lot no. 1204. 20w Spectrographic analyses 23w Middle Fork of Pine Creek. Lot no. 1205. 24w Spectrographic analyses 28w Leefe. Lot no. 1213. 29w Spectrographic analyses 31w

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING by V. E. McKelvey, L. E. Smith, R. A. Hoppin, and F. C. Armstrong 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 publi­ cation, the tabular data to be included in these Circulars are hereby placed on open file in simple reproduction form (prepared by Ozalid 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 P05 and acid insoluble for all samples and additional analyses, such as A103, Fe2O3, loss on ignition, F, and for selected samples. Spectrographic analyses for a large number of elements are included 2 5, for samples 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.

LAYLAND CANYON, WYOMING. LOT NO. 1202. Phosphatic shale member of Phosphor'c formation sampled and upper shale member measured in hand trenches in Layland Canyon, sec. 19, and in next canyon to south, sec. 30, T. 27 N., R. 119 W., Lincoln County, Wyoming, on east limb of anticline. Beds P-1 through P-82 sampled in trench in lower shale member 300 feet above canyon bottom on north side of Layland Canyon; beds P-83 through R-1 sampled and upper shale member measured in trench 25 feet above canyon bottom on north side of canyon i mile to south. Beds in north trench strike N. 20' W. and dip 34' E. at Wells contact and strike N. 15 W. and dip 76" E. in upper part of section; beds in south trench strike N. 13° W. and dip 80° E. Phosphatic shale member measured by D. M. Larrabee, R. A. Hoppin, and L. E. Smith and sampled by R. P. Sheldon, R. A. Gulbrandsen, R. S. Sears, and 0. A. Payne in June and July 1947; upper shale member measured by F. C. Armstrong in September 1947. Samples analyzed for P205 and acid insoluble by U. S. Bureau of Mines Laboratory, Albany, Oregon, and for A1203, Fe2O3, and loss on ignition by U. S. Geological Survey. Bed Sample Thickness Cumulative Thickness x Rock description . oss on ci thickness no. no. (feet) Al0 Fe2O3 P205 ignition insoluble (feet) percent P (cumulative, Dinwoody formation id2.0 Limestone, sandy Upper shale member of Phosphoria formation U- 12 Mudstone U- 11 Mudstone, contains phosphatic limestone concretion at base U- 10 Mudstone, calcareous, cherty U9 Muds tone

U8 Mudstone U7 Mudstone U6 Mudstone, calcareous U5 Mudstone U4 Mudstone U3 Limestone, sandy U2 Phosphate rock, cherty U1 Phosphate rock, cherty Rex member of Phosphoria formation-basal bed only RAH- 147-47 1711 Chert, contains calcite veinlets o hatic shale member of Phosphoria formation RAH- 148-47 P-105 Limestone, argillaceous RAH- 149-47 P-104 Phosphate rock P-103 Mudstone, contains phosphatic mudstone RAH- 150-47 lens 0.2 foot thick RAH- 151-47 P-102 Mudstone E4.32 RAH- 152-47 Mudstone, calcareous RAH- 153-47 P-100 Mudstone

Bed no. Rock description Sample no. Thickness (feet) P205 Chemical analyses (percent) Loss on Acid A1203 Fe2O3 ignition insoluble Cumulative thickness (feet) Thickness x percent P2O5 (cumulative/ P- 99 P- 98 P- 97 P- 96 P- 95 Phosphate rock Phosphate rock and mudstone Phosphate rock Phosphate rock Phosphate rock RAH- 154-47 RAH- 155-47 RAH- 156-47 RAH- 157-47 RAH- 158-47 Z1.0 P- 94 P- 93 P- 92 P- 91 P- 90 Mudstone, phosphatic Limestone, argillaceous Phosphate rock Phosphate rock, mudstone , and limestone Phosphate rock RAH- 159-47 RAH- 160-47 RAH- 161-47 RAH- 162-47 RAH- 163-47 4.5 4.45 16.8 P- 89 P- 88 P- 87 P- 86 P- 85 Phosphate rock, argillaceous Phosphate rock Mudstone, calcareous and phosphate rock Mudstone, calcareous Phosphate rock, calcareous and limestone RAH- 164-4 7 RAH- 165-47 RAH- 166-47 RAH- 167-47 RAH- 168-47 P- 84 P- 83 P- 82 P- 81 P- 80 Mudstone, phosphatic Lime stone, "hanging-wall limestone" Mudstone, phosphatic Mudstone Mudstone RAH- 169-47 RAH- 170-47 LES- 258-47 LES- 257-47 LES- 256-47 P- 79 P- 78 P- 77 P- 75 Mudstone Mudstone Mudstone Mudstone, phosphatic Limestone, argillaceous, "footwall limestone" LES- 255-47 LES- 254 -47 LES- 253-47 LES- 252-47 LES- 251-47 P- 74 P- 73 P- 72 P- 71 P- 70 Mudstone Mudstone, phosphatic Mudstone, calcareous Mudstone, calcareous Limestone, argillaceous LES- 250-47 LES- 249-47 RAH- 139-47 RAH- 138-47 RAH- 137-47 - P- 69 Mudstone, calcareous, phosphatic P- 68 Limestone, argillaceous P- 67 Mudstone, phosphatic P- 66 Limestone, argillaceous P- 65 Phosphate rock, argillaceous RAH- 136-47 RAH- 135-47 RAH- 134-47 RAH- 133-47 RAH- 132-47 O. 5 P- 64 Limestone, argillaceous, phosphatic P- 63 Phosphate rock, argillaceous Three limestone concretions in bed P-63 RAH- 131-47 RAH- 129-47 RAH- 130 -47 (0. 0-1.4)

P- 62 f Phosphate rock, argillaceous P- 61 Phosphate rock, argillaceous P- 60 Limestone, argillaceous P- 59 Phosphate rock, argillaceous P - 58 Mudstone, calcareous, phosphatic RAH- 128-47 RAH- 127-47 RAH- 126-47 RAH- 125-47 RAH- 124-47 O. 7 O. 7 P- 57 P- 56 P- 55 P- 54 P- 53 Phosphate rock, argillaceous, calcareous Phosphate rock, argillaceous Limestone, phosphatic, argillaceous Phosphate rock and mudstone, calcareous Limestone, phosphatic RAH- 123-47 RAH- 122-47 RAH- 121-47 RAH- 120-47 RAH- 119-47 O. 7 10, 5 P- 52 P- SI P- 50 P- 49 P- 48 Mudstone Limestone Phosphate rock Limestone, argillaceous Phosphate rock RAH- 118-47 RAH- 117-47 RAH- 116-47 RAH- 115-47 RAH- 114-47 O. 6 3. n 1, 033. 35 P- 47 P- 46 P- 45 P- 44 P- 43 Limestone, argillaceous, phosphatic Mudstone, phosphatic, calcareous Mudstone Mudstone, calcareous Mudstone, phosphatic, calcareous RAH- 113-47 RAH- 112-47 RAH- 30-47 RAH- 29-47 RAH- 28-47 '2. 1 12,0 1, 054. 14 1, 072. 74 1, 100. 82 1, 106. 07 1, 113.27 P- 42 P- 41 P- 40 P- 39 P- 38 Limestone, argillaceous Phosphate rock, argillaceous Phosphate rock Mudstone, phosphatic Mudstone, calcareous RAH­ 27-47 RAH-26-47 RAH 25-47 RAH­ 24-47 RAH­ 23-47 I, 133. 42 1, 144.92 1, 161.54 1, 171. 24 1, 174. 54 P- 37 P- 36 P- 35 P. 34 P- 33 Phosphate rock, argillaceous Mudstone, phosphatic Mudstone Limestone Phosphate rock, argillaceous RAH­ 22-47 RAH­ 21-47 RAH­ 20-47 RAH­ 19-47 RAH-18-47 O. 3 7, 1 1, 181.62 1, 206. 22 1, 208. 35 1, 211. 55 1, 224.35 F- 32 P- 31 P- 30 P- 29 P- 28 Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous Phosphate rock Phosphate rock RANRAHRAHRAHRAH17-47 O. 2 104, 35 1, 242.27 1, 245. 89 1, 266. 90 I, 304. 58 1, 369. 26 P- 27 P- 26 P- 25 P- 24 P- 23 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock RAHRAHRAHRAHRAH12-47 O. 6 O. 3 O. 3 1, 381. 18 1, 399. 42 1, 420. 22 1, 428. 59 1, 436. 51 P- 22 P- 21 P- 20 P- 19 Phosphate rock, argillaceous Phosphate rock, argillaceous Limestone, argillaceous Mudstone, phosphatic, calcareous RAH­ RAH­ RAH­ RAH-4-47 O. 2 III, 35 J 1, 440.93 1, 448: 65 1, 455.05 1, 459.81 psi?

Chemical anal ses rcent Bed Sample Thickness Cumulative Thickness x no. Rock description no. (feet) P..0 Al 0 Fe 0 ass on Acid thickness percent P21:3 ignition insoluble (feet) (cumulatilief P- 18 Phosphate rock, argillaceous RAH3-47 1, 475.63 P- 17 Limestone, argillaceous, phosphatic RAH2-47 1, 486. 96 P- 16 Phosphate rock, argillaceous RAH1-47 1, 495.28 P- 15 Dolomite, calcareous DML- 24-47 1, 499. 57 P- 14 Mudstone, cherty DML- 23-47 1, 499. 84 P- 13 Limestone, argillaceous DML- 22-47 1, 501.03 P- 12 Phosphate rock DML- 21-47 1, 532. 10 P- 11 Phosphate rock, calcareous, contains fluorite DML- 20-47 1, 579. 02 P- 10 DML- 19-47 1, 581. 78 Mudstone, phosphatic P9 Limestone, argillaceous DML- 18-47 1, 586. 26 DML- 17-47 1, 588. 44 P8 Phosphate rock, argillaceous DML- 16-47 1, 596.06 P7 Phosphate rock, argillaceous DML- 15-47 1, 596.93 P6 Mudstone DML- 14-47 1, 598. 21 P5 Mudstone, calcareous DML- 13-47 O. 2 1, 598. 31 P4 Mudstone DML- 12-47 1, 599.31 P3 Mudstone DML- 11-47 1, 609. 33 P2 Phosphate rock DML- 10-47 1, 623.25 Phosphate rock Wells formation - not measured Cw- 1 I Mudstone, calcareous and Limestone u

SPECTROGRAPHIC ANALYSES —LAYLAND CANYON, WYOMING. LOT NO. 1202. Semi-quantitative analyses of samples of the Phosphoria formation, Layland Canyon, Wyoming (see immediately preceding pages for location of section, thickness and description of strata, and chemical analyses of samples), made by U. S. GeologicalSurvey Laboratory, Geochemistry and Petrology Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Be, B. Ce, Cs, Co, Cb, Ge, In, Hg, Nd, Pt, Re, Rb, Sc, Ta, T1, Th, 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' 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 La Pb Mg Mn Mo Ni P Si Ag Na no. Sr Sn Ti V Y Zn Zr Beds P-I05 throughP-100 not analyzed. P-99 RAH-154-47 B' F F E F B' E E D E F E A B' GDDFEDEEF P-98 RAH-155-47 B' E F FF A E E B' E E D E F E A GDDEEDEEF P-97 RAH-156-47 B' D F F A E F B' E E D E F E A B' GDDF EDEEF P-96 RAH-157-47 B' F F A E F B' E E D E F E A GDDFEDEEF P-95 RAH-158-47 B' F F A E E B' F E D E F E A B' GDDFEDEEF P-94 RAH-159-47 B' E F F B' D E B' E E D E F E B' A G D D F D D E P-93 RAH-160-47 B' F F F B' E F B' ND F B' E F E D A G E D F D E F E P-92 RAH-161-47 B' F F F A D F B' E F D E F F A B' G D D F E E E P-91 RAH-162-47 B' F F F A D F B' E F D E F F A B' G D D F E E E E P-90 RAH-163-47 B' F F F A D F B' E E D E F E A B' G D D ND E E E P-89 RAH-164-47 B' F F F A D E B' E E D E F E A G D D F D E E E P-88 RAH-165-47 B' F F ND A D F B' E E D E F E A B' G D D F D E E E P-87 RAH-166-47 B' F F F B' D F B' E E E F E A G D D F D E E E P-86 RAH-167-47 B' F F F B' D F B' F F B' E F E B' A G D D F D E E E P-85 RAH-168-47 F F F A D F B' E F D E F E A G ND D F E E E E D E F E A G D D F D D E E E P-84 RAH-169-47 B' E F F B' D E B' E E Beds P-83 through P-49 not analyzed. E B' E E D F F A B' G D D F E D E E F P-48 RAH-114-47 IB' EIFIFIA E Beds P-47 through P-34 not analyzed. E F F E A B' G D D F E D E P-33 RAH- 18-47 B' F F E A E E B' F D F ND A B' G D D F D E F P-32 RAH- 17-47 B' F F E A E E B' F E D A B' G D D F D E E E E B' F E D E F P-31 RAH- 16-47 B' F F E A E E D F P-30 RAH- 15-47 B' F F E A E F B' F E B' E F E A B' G D D F F F E D F F E A B' G D D F E D E F P-29 RAH- 14-47 B' E F E A E 411 tv3 Pun DI'11Pt DI til B' is equivalent to B and C of Bureau of Mines analyses.

d Sample no. Al 13a B Cd Ca Cr Cu Fe La Pb Mg Mn Mo Ni Si no. Ag NaI Sr J Sn 1 Ti 1 V Y I Ar. Zr P-28 RAH- 13-47 B' F F A E F B' F E D F F A B' G D F E D E E F P-27 RAH- 12-47 B' A B' A B' F E F E F E F E D F E F P-26 RAH- 11-47 B' E F A D B' F E D E F A B' G P-25 RAH- 10-47 B' E F A D B' F F D F A B' G F E D F E E P-24 RAH9-47 B' E F E A D B' F D E F A B' G E F E D F E F P-23 RAH8-47 B' E F A D E B' ND F D E F A B' G P-22 RAH7-47 B' E F A D E B' F B' F F A B' G P-21 RAH6-47 B' E F E A D E 13' F F D E F F A B' G P-20 RAH5-47 B' E F E A D E B' ND F B' F B' 13' G P-19 RAH4-47 B' E F A D E B' F E 13' E F F A B' G CJOVUOat1000 F E D F F E F E D F E F F E D F F E ND E D F D F E D F D P-18 P-17 P-16 RAHRAHRAH3-47 B' B' B' F F E E A A A D D E E B' B' B' F F E D B' B' E F F A B' A B' B' B' G G D E D E D E F E D F E D F E E F F F F Beds P-15 through P-1 not analyzed. w Amml11.11)"

COAL CANYON, WYOMING. LOT NO. 1201. Phosphoria formation sampled in hand trenches, mine adit, and natural exposures in Coal Canyon, sec. 7, T. 26 N., R. 119 W., Lincoln County, Wyoming, on east limb of Subtette anticline. Upper shale member sampled in trench 200 feet above canyon bottom on south side; Rex member in natural exposures 50 feet above canyon bottom on south side; beds P-69 to P-74 from vanadiferous zone in face of adit 50 feet above canyon bottom on north side, all other beds from trench in phosphatic shale member at bottom of canyon on south side. Beds strike north and dip 75 E. Section measured by V. E. McKelvey, D. M. Larrabee, and L. E. Smith and sampled by R. A. Gulbrandsen; samples 2058­2087 collected in June 1946, all others in June 1947. Samples analyzed by Tennessee Valley Authority. Chemical analyses (percent) Sample Thickness Cumulative Thickness x Rock description F 1 Loss on Acid thickness Bno. eli no. (feet) I P205 Al 0 IFe 0 I V 0 1 percent P ,05 ignition insoluble (feet) (cumulatilriej Dinwoody formation 'ltd - 1 IMudstone iEM-97-471 1.7 0. 131 11. 7 F Upper shale member of Phosphoria formation U- 27 Phosphate rock, argillaceous VEM -96-47 U- 26 Phosphate rock and chert VEM-95-47 U- 25 Chert, dolomitic VEM-94-47 U- 24 Mudstone and chert VEM-93-47 O. 04 O. 13 U- 23 Mudstone, cherty VEM- 92 -47 O. 18 U- 22 Mudstone VEM-91-47 2.93 11.2 O. 34 U- 21 Mudstone VEM -90-47 4. 60 10. 7 O. 58 U- 20 VEM -89 -47 4.00 11.7 O. 10 Mudstone VEM-88-47 U- 19 Mudstone O. 06 U- 18 Mudstone, calcareous VEM-87-47 VEM-86-47 O. 11 U- 17 Limestone, argillaceous O. 18 U- 16 Mudstone VEM -85-47 O. 16 U- 15 Dolomite VEM-84-47 O. 19 U- 14 Mudstone VEM-83-47 O. 24 U- 13 Mudstone VEM-82-47 O. 26 U- 12 Mudstone VEM-81-47 0. 85 10.4 0. 60 10. 3 U- 11 Mudstone VEM-80-47 UU- U10 Mudstone, dolomitic Mudstone Mudstone VEM-79-47 VEM-78-47 VEM - 77-47 UU- UU- U7 Mudstone Phosphate rock, cherty Mudstone Chert Chert VEM-76-47 VEM-75-47 VEM-74-47 VEM-73-47 VEM - 72-47 Z. 3 UU- Phosphate rock, cherty Phosphate rock, argillaceous VEM- 71-47 VEM-70-47 W '1

Bed no. Rock description Sample no. Thickness (feet) P205 Chemical analyses (percent) Loss on 1 Acid A1203 Fe2O3 F ignition insoluble Cumulative thickness (feet) Thickness x percent P (cumulative/ 2OS Rex member of Phosphoria formation r RR- RR- Chert and limestone, represents top of VEM -68-47 resampled in upper shale trench Chert and limestone Chert and limestone Chert and limestone Chert and limestone VEM-69-47 VEM-68-47 VEM-67-47 VEM-66-47 VEM -65-47 (1.4) Z.92 RR- R3 Chert and limestone; fos. col. no. 47-11W-48' Chert and limestone Chert and limestone; fos. col. no. 47-HW-49 VEM-64-47 VEM-63-47 VEM-62-47 Phosphatic shale member of Phosphoria formation Covered

Dolomite, calcareous, argillaceous Phosphate rock Mudstone Muds tone DML-9-47 DML-8-47 DML - 7-47 DML-6-47 99 Mudstone Mudstone, dolomitic Mudstone Phosphate rock Dolomite, argillaceous DML- 5-47 DML-4-47 DML-3-47 DML-2-47 DML-1-47 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock 8,2 Phosphate rock Phosphate rock, argillaceous Mudstone, dolomitic VEM-6I-47 VEM-60-47 P- 89 Limestone, argillaceous, dolomitic Phosphate rock VEM-59-47 VEM-58-47 P P P Phosphate rock, calcareous, contains limestone lens 0.0­ 0. 3 foot thick Phosphate rock, argillaceous Phosphate rock VEM-57-47 VEM -56-47 VEM-55-47

P- 85 P- 84 P- 83 P- 82 P- 81 Phosphate rock Phosphate rock and phosphatic mudstone Phosphate rock, limestone, and mudstone Limestone, argillaceous Mudstone, calcareous and phosphate rock VEM- 54 -47 VEM-53-47 VEM-52-47 VEM-51-47 VEM-50-47 0. 06 13.0 0.05 11.6 0.05 13.Z 0. 06 10. 24 0.05 10.45 P- 80 P- 79 P- 78 P- 77 P- 76 Limestone, argillaceous, mudstone, and phosphate rock Mudstone, calcareous Phosphate rock Limestone, argillaceous, calcareous mudstone, and phosphate rock Limestone, "hanging-wall limestone" VEM-49-47 VEM-48-47 VEM-47-472 VEM-46 -47 VEM-45-47 O. 11 0.07 I 1.1 0.06 10.06 16, 8 P- 75 P- 74 P- 73 P- 72 P- 71 Mudstone Mudstone Mudstone Mudstone Mudstone VEM-44 -47 VEM-43-47 VEM-42-47 VEM-41-47 VEM-4047 O. 65 Z. 73 O. 14 P- 70 P- 69 P- 64 P- 67 P- 66 Limestone, argillaceous, "footwall limestone" Mudstone, phosphatic Mudstone Mudstone Mudstone, calcareous, dolomitic VEM-39-47 VEM-38-47 VEM-37-47 VEM-36-47 VEM-35-47 P- 65 Mudstone. phosphatic, and calcareous phosphatic mudstone P- 64 Dolomite, argillaceous P- 63 Mudstone, phosphatic P- 62 Phosphate rock, argillaceous P- 61 Limestone, dolomitic, argillaceous P- 60 Dolomite, argillaceous P- 59 Phosphate rock, dolomitic, argillaceous, dolomite lens included in sample P- 58 Dolomite P- 57 Mudatone, phosphatic P- 56 Dolomite VEM-34-47 VEM- 33-47 VEM-32-47 VEM- 31 -47 VEM-30-47 VEM-29-47 VEM-28-47 VEM-27-47 VEM-26-47 VEM-25-47 13. 63 10. 5 O. 08 O. 08 O. 18 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. Z See additional analyses of selected samples at end of chemical analyses tables.

Chemical analyses (percent) Bed Sample Thickness Cumulative Thickness x Rock description Loss on Acid no. no. (feet) A1203 Fe2O3 V205 F thickness percent P,Oc P205 ignition insoluble (feet) (cumulattirel P- 55 Phosphate rock, dolomitic VEM-24-47 1.6 14.85 4.3 1.4 0.21 1,5 Z2.4 P- 54 Dolomite VEM-23-47 5.38 1.3 0.9 0.04 0.56 35.9 P- 53 Phosphate rock and phosphatic mudstone VEM-22-47 2. 5 21.00 4.5 1.7 0.09 2.1 18.9 P- 52 Dolomite, phosphatic VEM-21-47 8.11 0.1 0.5 0.07 0.78 35.8 P- 51 Phosphate rock VEM-20-47 0.3 24.35 2. 8 1.7 0.08 2. 6 11.9 P- 50 Dolomite, calcareous VEM-19-47 1.1 0.06 0.47 34.8 Fault (strikes N. 10' W. dips 60' E.) truncates beds P-50 and P-51. P- 49 P- 48 Phosphate rock Dolomite VEM-18-47 VEM- 17-47 0.6 26.01 3.1 1.4 0.06 2.9 11.2 4.04 I.7 1.0 0.07 0.44 37.0 P- 47 P- 46 Dolomite Dolomite, argillaceous VEM-16-47 VEM-15-47 3.05 1.7 0.9 0.09 0.35 38.7 4.85 3.7 1.7 0.08 0.56 30.5 P- 45 P- 44 P- 43 P- 42 P- 41 Phosphate rock Phosphate rock Phosphate rock Dolomite Mudstone, phosphatic VEM-14-47 LES-10-47 LES- 9-47 LES- 8-47 LES- 7-47 0.8 28.85 1.3 0.9 0.08 3.3 11.0 1.3 26.24 2.3 1.2 0.25 2.9 13.6 0.7 29.26 1.2 1.0 0.13 3.2 4.41 2.0 0.8 0.05 0.44 33.7 888.2E. P- 40 P- 39 P- 38 P- 37 P- 36 Mudstone, dolomitic Mudstone, phosphatic Dolomite, argillaceous Dolomite, argillaceous Dolomite, argillaceous LES- 6-47 LES- 5-47 LES- 4-47 LES- 3-47 LES- 2-47 1.55 4.6 2.1 0.05 0.19 22.5 0.6 12.33 8.5 2.5 0.07 1.1 10.2 1.90 2. 2 0.9 0.04 0.21 31.5 4.75 2.3 0.8 0.05 0.50 27.6 7.08 2.4 0.8 0.05 0.75 24.7 P- 35 P- 34 P- 33 P- 32 P- 31 Phosphate rock, argillaceous Phosphate rock Mudstone and phosphate rock, contains gypsum Mudstone, dolomitic Phosphate rock, argillaceous LES- 1-47 VEM-13-47 0.4 23.34 3.7 1.3 0.06 2.3 0.6 30.00 I.8 0.7 0.09 3.2 8.1 3.0 2.6 0.35 0.83 19.6 P- 30 P- 29 P- 28 P- 27 P- 26 P- 25 P- 24 P- 23 P- 22 P- 21 Mudstone, phosphatic Mudstone, dolomitic Dolomite, argillaceous Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous. dolomitic 2.5 i 2.2 6.0 2.4 1.9 0.23 0.88 16.6 6.4 1.3 1.2 0.18 0.71 25.7 f 2.1 1.1 0.30 2.4 1.7 28.6 1.4 0.7 0.09 2.6 1.7 26.7 1.9 0.8 0.14 2.7 0.8 21.1 2.0 1.0 0.10 2.1 12.2 1.3 0.09 1.8 14.7 I, 000.71 1,032.27 1, ':87.08 1,095.93 1,144.55 1,189.94 1,206.82 1,221.58

P- 20 P- 19 P- 18 P- 17 P- 16 Phosphate rock, argillaceous, dolomitic Phosphate rock, argillaceous. dolomitic Dolomite, argillaceous Dolomite, phosphatic. argillaceou Dolomite O. 7 1, 7 I, 236. 94 1, 253. 99 1, 258. 82 1, 264. 14 1, 276. 10 P- I S P- 14 P- 13 P- 12 P- 11 Phosphate rock Dolomite Phosphate rock, dolomitic Dolomite, phosphatic Phosphate rock VEM-12-472 VEM-11-47 VEM-10-472 VEM- 9-47z VEM- 8-47z O. 05 I, 304. 11 1, 307. 31 1, 321.43 1, 327. 18 1, 347. 41 P- 10 P9 P8 P7 P6 Mudstone VEM- 7-47z Dolomite, phosphatic, argillaceous Phosphate rock, argillaceous Mudstone Mudstone, dolomitic VEM- 6-47 5, 0 O. 17 O. 77 137, 95 1, 350.41 1, 363. 99 1, 372.23 1, 374. 73 1, 375.41 PP- PP- P5 Mudstone Mudstone Mudstone Mudstone Phosphate rock VEM- 5-47 VEM- 4-47 VEM- 3-47 VEM- 2-47 VEM- 1-47 O. 04 O. 19 O. 29 O. 25 1, 375. 56 1, 375. 82 1, 375. 90 1, 376. 84 1, 382. 65 Wells formation Cw - 5 Cw - 4 Cw - 3 Cw - 2 Cw - 1 Limestone, sandy Limestone Siltstone, calcareous Limestone, sandy Limestone

2 See additional analyses of selected samples at end of chemical analyses tables. 11 is

Additional analyses of Coal Canyon samples Bed no. Sample no. SiO2 CaO MgO Na2O TiO2 S as SO3 D- 1 VEM-97-47 nil U- 27 U- 26 U- 25 U- 24 U- 23 VEM-96-47 VEM-95-47 VEM-94-47 VEM-93-47 VEM-92-47 U- 22 U- 21 U- 20 U- 19 U- 18 VEM-91-47 VEM-90-47 VEM-89-47 VEM-88-47 VEM-87-47 nil U- 17 U- 16 U- 1S U- 14 U- 13 VEM-86-47 VEM-85-47 VEM -84-47 VEM-83-47 VEM-82-47 O. 37 U- 12 U- 11 U- 10 U- 9 U- 8 VEM-81-47 VEM -80-47 VEM-79-47 VEM-78-47 VEM- 77-47 3. /0 UU- 6 U- 5 U- 4 VEM- 76-47 VEM-75-47 VEM-74-47 VEM-74-47 U- 3 VEM- 72-47 UU- VEM -71-47 VEM- 70-47 VEM-69-47 RR- 6 R- 5 RVEM-68-4 7 I 73.49 VEM-67-47 VEM-66-47 VEM-65-47 nil nil R- 3 RR- 1 VEM-64-47 VEM-63-47 VEM-62-47 O. 48 nil P-107 P-106 DML- 9-47 DML- 8-47 O. 47

P-105 P-104 P-103 P-102 P-101 P-100 P- 99 P- 98 P- 96 DML- 7-47 DML- 6-47 DML- 5-47 DML- 4-47 DML- 3-47 DML- 2-47 DML- 1-47 SS. 26 P- 95 P- 94 P- 93 VEM-61 -47 P- 91 VEM-60-47 P- 90 VEM-59-47 P- 89 VEM-58-47 P- 88 VEM- 57-47 P- 87 VEM-56-47 P- 86 VEM-55-47 P- 85 VEM-54-47 P- 84 VEM-53-47 P- 83 VEM-52-47 P- 82 VE14-51-47 P- 81 VEM-50-47 P- 80 VEM-49-47 P- 79 VEM-48-47 P- 78 VEM-47-472 P- 77 VEM-46-47 P- 76 VEM-45-47 P- 75 VEM-44-47 P- 74 VEM-43-47 P- 73 VEM-42-47 P- 72 VEM-41-47 P- 71 VEM-40-47 P- 70 VEM-39-47 P- 69 VEM-38-47 P- 68 VEM-37-47 P- 67 VEM-36-47 P- 66 VEM-35-47 P- 65 VEM-34-47 P- 64 VEM-33-47 P- 63 VEM-32-47 4. Z 0,89 2 See additional analyses of selected samples at end of chemical analyses tables.

Bed no. Sample no. SiO2 CaO MgO Na2O

TiO2 H200O2 S as SO3 P- 62 P- 61 P- 60 P- 59 P- 58 VEM-31-47 VEM-30-47 VEM-29-47 VEM- 28-47 VEM-27-47 O. 13 P- 56 P- 55 P- 54 P- 53 VEM -26-47 VEM-25-47 VEM-24-47 VEM-23-47, VEM -22-47' 0. SO O. 10 O. 18 O. 11 O. 13 P- 52 P- 51 P- 50 P- 49 P- 48 VEM-2I-47 VEM- 20-47 VEM-19-47 VEM-18-47 VEM-17-47 O. 13 O. 04 0. 1f O. 53 P- 47 P- 46 P- 45 P- 44 VEM-16-47 VEM-15-47 VEM-14-47 LES- 10-47 LES9-47

O. 07 O. 79 P- 42 P- 41 LESLES8-47 O. 11 P- 40 P- 39 LESLES6-47 P- 38 LES4-47 P- 37 LES3-47 O. 26 P- 36 LES2-47 P- 35 LES1-47 VEM-13-47 P- 33 P- 32 P- 31 P- 30 P- 29 P- 28 P- 27 P- 26 P- 25 P- 24 P- 23 glr O. 13 O. 10 O. 10 P.- 22 P- 21

P- 20 P- 19 P- 18 P- 17 P- 16 /2.5 P- 15 P- 14 P- 13 P- 12 P- 11 VEM-12-472 VEM-11-4722 VEM 10-472 VEM- 9-47 VEM- 8-472 13, 00 O. 6 O. 08 O. 17 O. 12 O. 16 P- 10 P9 P8 P7 P6 VEM- 7-472 VEM- 6-47 0, 57 O. 59 O. 24 O. 19 O. 18 PP- PP- VEM- 5-47 VEM- 4-47 VEM- 3-47 VEM- 2-47 O. 17 O. 30 O. 16 O. 11 O. 10 P1 VEM- 1-47 O. 40 O. 07 3 See additional analyses of selected samples on next page. The SiO2 analysis for this sample is probably in error.

Additional analyses of selected samples4 Bed no. Sample no. P205 F SiO2 TiO2 CaO Na2O K20 MnO Ni P-97 P-95 P-77 P-25 P-24 VEM -47-47 P-12 to 15 P-10 to 11 2068s Cr2O3 Co Zn Cu Pb Ag MoO3 w Organic matter 0,010 4 Analyses made by U. S. Geological Survey, Geochemistry and Petrology Branch. 56 Sample no. 2068 is a composite of samples VEM-9-47 through VEM-12-47. 7 Sample no. 2067 is a composite of samples VEM - 7-47 and VEM -8-47. 8 CO2 and S reported present. CO, reported present, strong, and S reported present.

SPECTROGRAPHIC ANALYSES—COAL CANYON. WYOMING. LOT NO. 1201. Semi-qtuantitave analyses of samples of the phosphatic shale member of Phosphoria formation, Coal Canyon, Wyoming (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, Bi, Cd, Co, Ga. Au, Li, Hg, Pt, Ta, Sn, and W were looked for in all samples but were not detected. Explanation of symbols A more than 10 percent E 0.01-0.1 percent 5-10 percent F 0.001-0.01 percent C 1-5 percent G less than 0.001percent D 0.1-1 percent ND not detected Bed no. Sample no. Al Cb Cu Pb Mg Mn Mo Ni Si Ag J Na Ti V Zn Zr P-107 DML- 9-47 ND ND F A F ND G D F E F F B ND E ND E F ND F P -106 DML- 8-47 ND ND F A E ND G D ND D F F E B ND D ND E E ND E P-105 DML- 7-47 ND ND ND G D ND D F F E A ND E ND D E ND E P-104 DML- 6-47 ND ND ND ND F F E A ND D ND E E ND E p-I03 DML- 5-47 ND ND E ND G D ND D F F E A ND E ND E E ND E P-102 DML- 4-47 ND ND E F ND G D ND D E F E A ND D ND E F ND E P-I01 DML- 3-47 ND ND E ND G D ND D E F E A ND D ND E E ND E P-100 DML- 2-47 ND ND F ND G D ND D F F F B ND D ND E F ND E P- 99 P- 98 DML- 1-47 ND ND ND ND F A E ND ND G D ND ND D E F F A ND E ND F F F C E D ND E F ND E E E ND E P- 97 P- 96 P- 95 P- 94 P- 93 D D E E ND ND ND G G ND ND ND E F F F A A A A A D D E ND ND E ND F D F G D G D G E E E ND ND ND D D D D D E F E B G E E A G F F E C G ND F ND F F C G D D D D D E E ND ND ND E E F F. E D E E E D EDEF E D E F P- 92 P- 91 P- 90 P- 89 P- 88 VEM-61-47 VEM-60-47 VEM - 59-47 VEM-58-47 VEM-57-47 D D E E ND ND ND G ND ND ND ND E F F F A B D ND ND ND ND F G G G D D D E ND ND ND ND D D D E E E E F E F FD F F ND ND A G G ND ND D D D E E ND ND E E E E E E E E E ND E D ND E E ND E E F F P- 87 P- 86 P- 85 P- 84 P- 83 VEM - 56-47 VEM-55-47 VEM- 54-47 VEM-53-47 VEM-52-47 D D E ND ND ND ND ND ND ND F F F A A A E E ND ND ND G C G D G D ND ND ND ND ND D D F F E B G ND F ND F C G F F F D D D D E D D E E ND ND ND ND F F P- 82 P- 81 P- 80 P- 79 P- 78 VEM-51-47 VEM-50-47 VEM-49-47 VEM-48-47 VEM -47-47 D E E E E ND ND ND ND ND F F F F F A B B E D E E E G G G G G D D D D D ND ND ND ND ND D D D D E F F E F E E F E E F F F E A ND A ND A G A ND C G D D E D ND ND E ND E E E E ND E ND D E E ND ND E E

Bed Sample no. I Al 1 Ba Be B no. Ca Cr Cb Cu I Fe I Pb Mg Mn Mo Ni 1 Si Ag Na Sr I Ti V I Zn I Zr P- 77 VEM-46-47 C E ND E A E E G D ND P- 76 DENDEBGD E E VEM-45-47 D ND ND F A E ND F E E G E ND D P- 75 E ND ND C ND ND ND E VEM-44-47 C E G E B E ND F E ND F C E CEEE AGD P- 74 F D D E E VEM-43-47 C E G D C D ND F C E DIAIGGD D F D P- 73 VEM-42-47 CEGDC D ND F B E D D E CEDD A GD F D D E E P- 72 VEM-41-47 C E ND E C G C ND D E E E A G D P- 71 ND D D E E VEM-40-47 C E G E A D ND F C E C E E E A G D P- 70 F D E E E VEM-39-47 C E ND F A G D ND D E ND F B ND D ND E E ND E P- 69 VEM-38-47 C E G E A D ND F C E D E F E A G D E D E F E P- 68 VEM-37-47 C E ND E C G D ND D E ND E A ND D ND E E ND E P- 67 VEM-36-47 C E ND E C E E G C ND D E F E A ND D ND D E ND E P- 66 VEM-35-47 C E ND F A E E G D ND C E ND F A ND D ND E E ND E P- 65 VEM-34-47 C E ND E B D D G C ND D E F E A G D E E E E E P- 64 VEM-33-47 C E ND F B E ND G D ND C E ND F A ND D ND E E ND E P- 63 VEM-32-47 E ND I E A D E G C ND D E F E A GD EEEEE P- 62 VEM-31-47 C E G E A D ND F C E C E E E A I G E E D E E P- 61 VEM-30-47 C E ND F A E D G D ND C E F F B ND D ND E E ND E P- 60 VEM-29-47 C E ND F A E ND G D ND C F F E B G D ND E E ND E P- 59 VEM-28-47 C E G E A C ND F C E B E E D A D E D E F E P- 58 VEM-27-47 C E ND F B .E ND G E ND C F F EC ND ND E E ND F P- 57 VEM-26-47 C E ND E B E ND G D ND D F F E B G E E E E E F P- 56 VEM-25-47 C E ND F A E ND G E ND F ND F C ND E E E E ND F P- 55 VEM-24-47 C E ND F A E ND G D ND F F E C G D E E E E F P- 54 VEM-23-47 C E ND F A E ND G ND F ND F C G E E E E ND F P- 53 VEM-22-47 C E ND F A E E G D ND D F F E B ND D E E E E E P- 52 VEM-21-47 D E ND F I A E ND G ND F ND F C G E E E E ND F P- 51 VEM-20-47 C E ND F A EEG D ND D F F E C G D E E E E E P- 50 VEM-19-47 C E ND F A E ND G D ND F F E C G E E E E ND F P- 49 VEM-18-47 C E G E A D ND F E F E B GDEEEF E VEM-17-47 C E ND F A ENDG ND F F E C G E E E E ND F P- 47 VEM-16-47 D E I ND F B B ND G ND E C G E E E E ND F P- 46 VEM-15-47 C E G E A E ND F B F E A G D E E E E E P- 45 VEM-14-47 D E ND F A E ND G E ND D F F E C G E E E E ND F P- 44 LES- 10-47 CNDNDF A EEG D ND D ND E C G D ND E D E F P- 43 ND ND F A I E I ND I G D ND D ND F E C G D ND E E E F LES- 9-47 D ND C F F E A G E ND E E E F P- 42 LES- 8-47 ND ND F A E i ND G D F F E A G D ND E E P- 41 LES- 7-47 ND ND F B E ND G ND C F F F A G D ND E E ND E P- 40 LES- 6-47 ND ND F B E ND G D ND D F FE A G D ND E E P- 39 LES- 5-47 ND ND F B E ND G ND C F F F AGENDEE ND F P- 38 LES- 4-47 ND ND F A E IND G D ND ND CFFF AGE ND E E ND P- 37 LES- 3-47 ND ND F A E ND G D ND CFFF AGIE ND E E ND F P- 36 LES- 2-47 ND ND F A E ND

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NORTH FORK OF PINE CREEK, WYOMING. LOT NO. 1204. Phosphatic shale member of Phosphoria formation sampled in bulldozer trench onNorth Fork of Pine Creek, sec. 13, T. 25 N., R. 118 W., Lincoln County, Wyoming, 10 miles northeast of Cokeville on east limb of syncline. Beds strike N. 10-25' E. and dip 37-45° W. Section measured by R. A. Hoppin, V. E. McKelvey, and L. E. Smith and sampled by R. P. Sheldon, 0. A. Payne, and R. S. Sears in June and July 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Bed no. Rock description P-83 Mudstone, calcareous P-82 Mudstone, calcareous P-81 Limestone, argillaceous; fos. col. no. 47- Hw I P -80 Limestone, argillaceous; fos. col. no. 47-HW-53 P-79 Limestone, argillaceous; fos. col. no. 47-HW-52 P-78 Mudstone, calcareous; fos. col. no. 47-HW-51 P-77 Mudstone, calcareous; fos. col. no. 47-HW-50 P- 76 Mudstone, calcareous P-75 Limestone, argillaceous P-74 Mudstone P-73 Mudstone, phosphatic; fos. col. no. 47-HW-21 P-72 Mudstone; fos. col. no. 47-HW-20 P-71 Mudstone P-70 Mudstone, calcareous P-69 Mudstone P-68 Phosphate rock P-67 Mudstone, calcareous P-66 Phosphate rock, argillaceous P-65 Phosphate rock; fos. col. no. 47-HW-19 P-64 Mudstone P-63 Mudstone P-62 Mudstone P-61 Phosphate rock, argillaceous P-60 Mudstone, phosphatic P-59 Mudstone P-58 Phosphate rock, calciireous, argillaceous P-57 Mudstone, phosphatic P-56 Limestone, argillaceous, phosphatic Cumulative Thickness x thickness percent P205 (feet) (cumulative) RAH - 63-47 RAH 62-47 RAH - 61-47 RAH - 60-47 RAH - 59-47 RAH - 58-47 RAH - 57-47 RAH - 56-47 RAH - 55-47 RAH - 54-47 RAH - 53-47 RAH - 52-47 RAH - 51-47 RAH - 50-47 RAH - 49-47 RAH - 48-47 RAH - 47-47 RAH - 46-47 RAH - 45-47 RAH - 44-47 LES-116-47 LES-115-47 LES-114-47 LES-113-47 LES-112-47 LES-I 11-47 LES-110-47 LES-109-47 Chemical analyses (percent) Sample Thickness Loss on Acid no. (feet) P2O5 A1203 Fe2O3 ignition insoluble Phosphatic shale member of Phosphoria formation O. 55

P-55 Limestone, argillaceous; fos. col. no. 47-HW-18 P-54 Mudstone P-53 Mudstone P-52 Mudstone Mudstone LES-354-47 represents the upper half of P-51 Mud stone P-50 Mudstone, calcareous; fos. col. no. 47-HW-17 P-49 i Mudstone P-48 I Mudstone, phosphatic P-47 Mudstone, calcareous and limestone P-46 Mudstone, calcareous P-45 Mudstone, phosphatic P-44 Mudstone, calcareous P-43 Phosphate rock, argillaceous, contains calcareous concretions; fos. col. no. 47-HW-41 P-42 Limestone, argillaceous; fos. col. no. 47-HW-16 P-41 Phosphate rock, argillaceous, calcareous P-40 Limestone, argillaceous, phosphatic P-39 Phosphate rock, argillaceous, calcareous P-38 Phosphate rock, argillaceous, calcareous P-37 Phosphate rock, argillaceous, calcareous, contains chert lenses P-36 Limestone, argillaceous P-35 Chert, contains quartz vugs; fos. col. no. 47-HW-15 P-34 Mudstone, phosphatic P-33 Phosphate rock, silty and mudstone P-32 Phosphate rock P-31 Phosphate rock, argillaceous P-30 Mudstone, phosphatic, calcareous P-29 Limestone, argillaceous P-28 Mudstone, calcareous, phosphatic P-27 Limestone, argillaceous, contains chert lenses P-26 Phosphate rock P-25 Mudstone, calcareous P-24 Mudstone, calcareous P-23 Mudstorie P-22 Mudstone O. 4 LES-108-47 LES-107-47 LES-106-47 LES-105-47 LES-354-47 (0.5) LES-185. bed P-52. LES-104-47 LES-103-47 LES-102-47 LES-101-47 LES-100-47 LES- 99-47 LES- 98-47 LES- 97-47 LES- 96-47 LES- 95-47 LES- 94-47 LES- 93-47 LES- 92-47 LES- 91-47 LES- 90-47 LES- 89-47 LES- 88-47 LES- 87-47 LES- 86-47 LES- 85-47 LES- 84-47 LES- 83-47 LES- 82-47 LES- 81-47 LES- 80-47 LES- 79-47 LES- 78-47 LES- 77-47 LES- 76-47 i LES- 75-47 O. 5 O. 5 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey.

Bed no. Rock description Sample no. Thickness (feet) P2O5 Chemical analyses (percent Loss on A1203 Fe2O3 ignition Acid insoluble Cumulative thickness (feet) Thickness x percent P2O5 (cumulative/ P-21 P-20 P-19 P-18 P-17 Mudstone Phosphate rock Mudstone, contains chert lenses Mudstone and chert Mudstone, calcareous and chert LES- 74-47 LES- 73-47 LES- 72-47 LES- 71-47 LES- 58-47

P-16 P-15 P-14 P-13 P-12 Mudstone, calcareous and chert Mudstone, calcareous and chert Mudstone, calcareous and chert Limestone, argillaceous and phosphate rock Limestone, argillaceous LES- 57-47 LES- 56-47 LES- 55-47 LES- 54-47 LES- 53-47 P-11 P-10 P- 9 P- 8 P- 7 Mudstone, calcareous Limestone, argillaceous Mudstone, phosphatic Mudstone, calcareous Limestone, argillaceous LES- 52-47 LES- 51-47 LES- 50-47 LES- 49-47 LES- 48-47 P- 6 P- 5 P.- 4 P- 3 P- 2 Mudstone, calcareous Limestone, argillaceous Mudstone Mudstone, calcareous Limestone, argillaceous LES- 47-47 VEM-104-47 VEM-103-47 VEM-102-47 VEM-101-47 fte P- 1 Phosphate rock, mudstone, and chert VEM-100-47 Wells formation Cw-2 Sandstone, phosphatic Cw-1 Mudstone, calcareous VEM- 99-47 VEM- 98-47

SPECTROGRAPHIC ANALYSES—NORTH FORK OF PINE CREEK, WYOMING. LOT NO. 1204. Semi-quantitative analyses of a few samples of the Phosphoria formation, North Fork of Pine Creek, Wyoming (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. In addition to the elements listed in the table below, Sb, As, Be, Bi, Cd, Ce, Cs, Co, Cb, Ge, In, Hg, Mo, Nd, Pt, Re, Rb, Sc, Ta, T1, Th, 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' 1-10 percent/ G less than 0.001 percent D 0.01-0.1 percent ND not detected E 0.01-0.1 percent Bed no. Sample no. Al Ba B Ca Cr Cu Fe La Pb I Mg Mn Ni P Si Ag Na Sr Sn Ti Y Zn Zr P-68 RAH-48-47 D F F A

D F D E E D F F B' G D D F E E F E P-67 RAH-47-47 F F B' E F D ND E D F B' A G D D F D ND F P-66 RAH-46-47 D F A F D E E D F F A B' G D D F E F P-65 RAH-45-47 D F F A E F D E F D E F A B' G D D F E E E i F B' is equivalent to B and C of Bureau of Mines analyses. tok

MIDDLE FORK OF PINE CREEK, WYOMING. LOT NO. 1205. Phosphoria formation sampled on north wall of Middle Fork of Pine Creek, sec. 35, T. 25 N., R. 118 W., Lincoln County, Wyoming, on westdipping Tump Range monocline. Beds R-26 to U-30 sampled in trench 150 feet above creek, all other beds in trench 50-200 feet above creek. Beds R-1 to R-25 measured in natural exposures 150-400 feet above creek. Beds strike N. 10° E. and dip 26' W. Section measured by R. A. Hoppin, F. C. Armstrong, and L. E. Smith and sampled by R. S. Sears and 0. A. Payne in June, July, and August 1947. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical anal ses (percent) iy Cumulative Thickness x Bed Sample Thickness Rock description Loss on Acid thickness percent P0, no. no. (feet) Al2O3 Fe 0 2 3 ignition insoluble (feet) (cumulatiVe) Dinwoody formation ltd -1 Mudstone, calcareous, fos. Fol. nos. 47-HW-31 and 47-HW-31A / Upper shale member of Phosphoria formation -30 Phosphate rock, argillaceous, calcareous; fos. col. nos. 47-HW-30 and 47-HW-30A RAH-43-47 Z. 2 -29 Chert, calcareous, phosphatic RAH-42-47 -28 Chert, calcareous RAH-41-47 -27 Chert, clacareous RAH-40-47 -26 Chert, calcareous RAH-39-47 -25 Mudstone, calcareous RAH-38-47 -24 Mudstone, calcareous RAH-37-47 -23 Mudstone, phosphatic, calcareous RAH-36-47 -22 Chert, calcareous RAH-35-47 -21 Chert, calcareous RAH-34-47 1-20 Chert, calcareous RAH-33-47 Mudstone and limestone RAH-32-47 -18 Mudstone, calcareous RAH-31-47 -17 Mudstone, calcareous LES- 46-47 -16 Mudstone, calcareous LES- 34-47 -15 Mudstone, calcareous LES- 33-47 Mudstone, calcareous LES- 32-47 -13 Mudstone, calcareous LES- 31-47 Phosphate rock and calcareous mudstone containing chert LES- 30-47 U-11 Mudstone, contains chert LES- 29-47 U-10 Mudstone, calcareous LES- 28-47 LES- 27-47 U Mudstone, calcareous LES- 26-47 U Mudstone U Limestone, argillaceous, phosphatic LES- 25-47 LES- 24-47 U 6 Mudstone, calcareous

U- 5 U- 4 U- 3 Phosphate rock, argillaceous Limestone, argillaceous Mudstone, calcareous LES- 23-47 LES- 22-47 LES- 21-47 U- 2 Mudstone, calcareous LES- 20-47 U- 1 Phosphate rock, argillaceous; fos. col. no. 47- HW-29 LES- 19-47 Rex member of Phosphoria formation -26 Limestone, phosphatic; fos. col. no. 47-HW-2.B LES- 18-47 ' -23 Limestone; fos. col. no. 47-HW-33 Limestone, phosphatic Limestone, contains chert; fos. col. -

no. 47-HW-36 -22 Limestone, phosphatic Limestone, cherty; fos. col. no. 47-HW-37 -20 Limestone and chert; fos. col. no. 47-HW-38 Limestone Limestone and chert; fos. col. nos. 47-HW-39 and 47-HW-40 Z. 0

-17 Limestone; fos. col. no. 47-HW-27 Limestone; fos. col. no. 47-HW-26 Limestone; fos. col. no. 47-HW-25

-14 Covered interval, probably fossiliferous limestone and chert -13 Limestone; fos. col. nos. 47-HW-23 and 47-HW-24

Limestone and chert Limestone -10 Limestone and chert

- 9 Limestone and chert Mudstone, calcareous Mudstone, calcareous Mudstone, calcareous Mudstone, calcareous Mudstone, calcareous Chert and mudstone

Quartzite, phosphatic --, Mudstone, dolomitic 1 Fossil collection made by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey.

Chemical anal. ses Cumulative Thickness x Bed Sample Thickness Rock description Loss on Acid thickness percent P705 no. no. (feet) P Al 0 Fe 0 . . z 2 3 'glutton insoluble (feet) (cumulative; Phosphatic shale member of Phosphoria formation Mudstone, calcareous Mudstone, phosphatic, calcareous Mudstone, calcareous Phosphate rock, cherty Limestone, argillaceous LES- 11-47 LES- 12-47 LES- 13-47 LES- 14-47 LES- 15-47 Mudstone, calcareous Mudstone and argillaceous limestone Phosphate rock Phosphate rock Phosphate rock LES- 16-47 LES- 17-47 LES- 35-47 LES- 36-47 LES- 37-47 0,55 53,12 Mudstone and phosphate rock Limestone, argillaceous Phosphate rock Phosphate rock, argillaceous Phosphate rock; fos. col. no. 47-HW-22 LES- 38-47 LES- 39-47 LES- 40-47 LES- 41-47 LES- 42-47 164.9; 165.6...) Mudstone, calcareous Phosphate rock, argillaceous Mudstone, calcareous Phosphate rock Limestone, argillaceous LES- 43-47 LES- 44-47 LES- 45-47 LES- 59-47 LES- 60-47

Phosphate rock, argillaceous Limestone, argillaceous Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous LES- 61-47 LES- 62-47 LES- 63-47 LES- 64-47 LES- 65-47 Limestone, argillaceous Mudstone LES- 66-47 FCA-15-47 Phosphate rock, argillaceous Mudstone FCA-16-47 LES- 68-47 Mudstone FCA-17-47 .n . Mudstone FCA-18-47 -42 Mudstone FCA-19-47 Mudstone FCA-20-47 -40 Dolomite FCA- 1-47 - -39 Mudstone, calcareous FCA- 2-47 Mudstone FCA- 3-47 Mudstone, phosphatic Limestone, argillaceous Mudstone, calcareous Mudstone, phosphatic FCA- 4-47 FCA- 5-47 FCA- 6-47 FCA- 7-47 -

P-33 Limestone, argillaceous P-32 Limestone, argillaceous P-31 Mudstone, phosphatic P-30 Limestone, argillaceous P-29 Phosphate rock, argillaceous, calcareous P-28 Limestone, phosphatic P-27 Mudstone P-26 Phosphate rock, argillaceous, calcareous, contains concretions P-25 Phosphate rock, argillaceous, calcareous P-24 Limestone, argillaceous P-23 Limestone, argillaceous P-22 Phosphate rock, argillaceous P-21 Phosphate rock, argillaceous P-20 Phosphate rock, argillaceous P-19 Limestone P-18 Limestone, argillaceous P-17 Phosphate rock, calcareous, argillaceous P-16 Phosphate rock, calcareous, argillaceous P-15 Limestone; fos. col. no. 47-HW-14 P-14 Mudstone, phosphatic P-13 Phosphate rock P-12 Mudstone, calcareous, phosphatic P-11 Mudstone, calcareous, phosphatic p-10 Limestone, argillaceous P- 9 Limestone, argillaceous P- 8 Limestone, argillaceous, phosphatic P- 7 Mudstone, phosphatic P- 6 Limestone, argillaceous P- 5 Mudstone P- 4 Phosphate rock, calcareous P- 3 Limestone, argillaceous P- 2 Mudstone, phosphatic, calcareous P- 1 Limestone, argillaceous, phosphatic; fos. col. no. 47-HW-13 Cw-6 Limestone, cherty Cw-5 Chert, calcareous, argillaceous Cw-4 Chert, calcareous Cw-3 Chert, calcareous Cw-2 Limestone, cherty Cw-1 Chert, calcareous FCA- 8-47 FCA- 9-47 FCA-10-47 FCA-11-47 FCA-12-47 FCA-13-47 FCA-14-47 FCA-21-47 FCA-22-47 FCA-23 -47 FCA-24 -47 FCA-25-47 FCA-26-47 FCA - 27-47 FCA-28-47 FCA- 30-47 FCA-31 -47 FCA-32-47 FCA-33 -47 FCA- 34-47 FCA- 35-47 FCA-36-47 FCA-37-47 FCA- 38-47 FCA -39 -47 FCA-40-47 FCA-41-47 FCA-42-47 FCA-43-47 FCA-44 -47 FCA-45-47 FCA-46-47 FCA-47-47 FCA-48-47 FCA-232-47 FCA-231-47 FCA-230-47 FCA-229-47 1,15 O. 4

O. 7 2. 7, O. 3 O. 55 00 Wells formation S1.0 72, 15

SPECTROGRAPHIC ANALYSES—MIDDLE FORK OF PINE CREEK, WYOMING. LOT NO. 1205. Semi-quantitative analyses of a few samples of the Phosphoria formation, Middle Fork of Pine Creek, Wyoming (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, Ge, In, Hg, Mo, Nd, Pt, Re, Rb, Sc, Ta, T1, Th, 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' 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 La Pb Mg Mn Ni PSi Ag Na Sr Sn Ti Y Zn Zr no. P-66 LES-35-47 D F F F A D F D E E D F F AB'GDDFEEEF P-65 LES-36-47 DFFNDADFDEEDFF AB'GDDFEEEF P-64 LES-37-47 DFNDNDADFDEIEDFF AB'GDDF ENDEF 1 B' is equivalent to B and C of Bureau of Mines analyses.

LEEFE, WYOMING. LOT NO. 1213. Part of phosphatic shale member of Phosphoria formation sampled at two places in Leefe open pit mine of San Francisco Chemical Company 4 miles west of Sage, secs. 10 and 15, T. 21 N., R. 120 W., Uinta County, Wyoming. Beds are flat lying. Section of beds P-1 to P-11 from locality A measured and sampled by R. M. Campbell in December 1947; section of beds P-1 to P-23 from locality B measured by F. W. 0' Malley and R. A. Harris and sampled by Harris and R. A. Smart in October 1948. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. Chemical analyses (percent) Cumulative Thickness x Bed Sample Thickness Rock description Loss on Acid thickness percent P05 no. no. (feet) A1203 Fe203 ignition insoluble (feet) (cumulatiVel Locality A/ Phosphatic shale member of Phosphoria formation-partial section P-11 Phosphate rock, argillaceous RMC- 145-47 2.5* Z. 5 P-10 Limestone, argillaceous RMC- 144-47 P- 9 Phosphate rock AMC- 143-47 P- 8 Phosphate rock, argillaceous RMC- 142-47 P- 7 Phosphate rock RMC- 141-47 P- 6 Phosphate rock RMC- 140-47 P- 5 Phosphate rock, argillaceous RMC- 139-47 P- 4 Phosphate rock, argillaceous RMC- 138-47 P- 3 Phosphate rock, argillaceous RMC- 137-47 P- 2 Phosphate rock, argillaceous RMC- 136-47 P- 1 Phosphate rock, argillaceous RMC- 135-47 Z. 84 Locality B Phosphatic shale member of Phosphoria formation-upper part only P-24 Chert Bed P-24 may represent base of Rex member. P-23 Mudstone, cherty RH-3326 P-22 Phosphate rock, argillaceous RH-3325 P-21 Mudstone RH-3324 P-20 Phosphate rock, argillaceous RH-3323 P-19 Mudstone WOM - 3322 P-18 Mudstone, phosphatic and cherty phosphate rock WOM - 3321 P-17 Mudstone, phosphatic WOM - 3320 P-16 Phosphate rock and mudstone WOM - 3319 P-15 Phosphate rock WOM - 3318 P-14 Phosphate rock, calcareous RH-3317 Beds P-1 to P-11 of locality A are probably equivalent to beds P-9 through P-18 of locality B.

Bed no. Rock description Sample no. Thickness (feet) P 0 Z 5 Chemical anal sea rcent .;:ts on Al 0 Fe2O3 ignition insoluble Cumulative thickness (feet) Thickness x percent P 0 (cumulauve) P-13 P-12 P-11 P- 9 Phosphate rock Phosphate rock Phosphate rock Phosphate rock Phosphate rock, argillaceous RH-3316 RH-3315 WOM - 3314 WOM - 3313 WOM - 3312 P- 8 Mudstone WOM - 3311 P- 7 P- 6 Phosphate rock Phosphate rock Phosphate rock, argillaceous Phosphate rock, argillaceous WOM - 3310 WOM - 3309 WOM - 3308 WOM - 3307 1 Phosphate rock Mudstone and argillaceousphosphate rock Phosphate rock, argillaceous WOM - 3306 WOM - 3305 WOM - 3335

SPECTROGRAPHIC ANALYSES—LEEFE, WYOMING. LOT NO. 1213. Locality A Semi-quantitative analyses of samples of the Phosphoria formation, Leefe, Wyoming (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. In addition to the elements listed in the table below, Sb, As, Be, Bi, B, Ce, Cs, Cb, Ge, Hg, Mo, Nd, Pt, Re, Rb, Sc. Ta, T1, Th, Sn, and W, were looked for in all samples but were not detected. B' is equivalent to B and C of Bureau of Mines analyses. Explanation of symbols A more than 10 percent F 0.001-0.01 percent B' 1-10 percent' G less than 0.001 percent D 0.1-1 percent ND not detected E 0.01-0,1 percent Bed no. Sample no. Al Ba Cd Ca Cr Co Cu Ga In Fe La Pb Mg Mn Ni P Si Ag Na Sr Ti Yb Y Zn Zr P -11 RMC-145-47 B'ENDB'FNDF F GDENDEDEB'AGDD E E G E F F P-10 RMC-144-47 B'EF A F ND F F G D ND ND E D E D A G D E E E G F F E P- 9 RMC-143-47 DENDAENDFFNDEEFEEEAB'GDDEDGEFF P- 8 RMC-142-47 B'ENDAENDFFGDEF BEE ABIGDDEDGEEE P- 7 RMC-141-47 D :"NDAENDFFGDEEEDE AB'GDDEDGEEF P- 6 RMC-140-47 D E F A E F F F GDEEEDEAB'GDDEDGEEF P- 5 RMC-139-47 B'ENDB'EF F FGDFEEDEB'AGDDEDGEEE p- 4 RMC-138-47 B'EF A E F F F G D E E E D E AB'GDDEDGEEE P- 3 RMC-137-47 BIEF A E F FFGDEEEDEAB'GDDEDGEEE P- 2 RMC-136-47 B'EF A E F F F ND D E E E E E A A G D D E D G E E E p- 1 RMC-135-47 B'ENDA ENDF FNDDF EEDE A AGDDEDGEEX