Stratigraphic sections of the Lignite-bearing Tongue River Member, Fort Union Formation (Paleocene), Southwestern North Dakota

Warwick, Peter D.- pwarwick@usgs.gov, Luck, Kathleen R.

Stratigraphic sections of the Lignite-bearing Tongue River Member, Fort Union Formation (Paleocene), Southwestern North Dakota

Warwick, Peter D.- pwarwick@usgs.gov, Luck, Kathleen R. · 1995 · Report

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Public-domain full text preserved in the Mountain Man Mining Library. Original source: pubs.usgs.gov.

(203) 1290 as-676, U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Stratigraphic sections of the Lignite-bearing Tongue River Member, Fort Union Formation (Paleocene), Southwestern North Dakota By Peter D. Warwick' and Kathleen R. Luck' Open File Report 95-676 U.S. GEOLOGICAL SURVEY TON, VA. OCT 2 0 1995 SR L IBRARY This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 'Reston, Virginia

CONTENTS Introduction References Cited FIGURES Figure 1. Location of the measured sections 2. Stratigraphic nomenclature of western North Dakota TABLES Table 1. Location, elevation and thickness data for the measured sections 2. Explanation of the lithologic abbreviations 3. Measured section data

INTRODUCTION This report contains 102 measured sections from the Tongue River Member of the Fort Union Formation, which is exposed in southwestern North Dakota. The sections were measured by Peter D. Warwick during the summer of 1981. The sedimentologic and stratigraphic interpretation of these data can be found in Warwick (1982). These investigations were part of a larger project, headed by R.M. Flores (U.S. Geological Survey), that characterized the depositional environments of lignite-bearing strata in the Fort Union Formation of the Northern Great Plains Coal Province. The purpose of this report is to place the detailed lithologic descriptions into a format that is publicly available. The sections were measured along the valley walls of the Little Missouri River and its tributaries in Slope and Billings Counties, North Dakota (fig. 1). Table 1 provides location information for the measured sections. The locations and elevations reported in the table are the midpoints of the measured sections as plotted on U.S.G.S. 1:24,000 scale topographic maps. The longitude and latitude are considered to be within 500 ft (150 m) and the elevation of the section midpoint is within 50 ft (15 m) of the actual values. Explanations for the abbreviations used for the lithologies in the measured sections are found in Table 2. Lithologic descriptions for each of the measured sections are shown in table 3. The fossils observed within the measured section are considered to be freshwater invertebrates and are dominated by gastropods and pelecypods. Two members of the Fort Union Formation are present in the measured sections, the Sentinel Butte and the Tongue River Members (fig. 2). Where the Sentinel Butte Member is present at the surface, measurements were made only for the clinker (baked shale and remains of burned lignite) of the HT lignite bed which forms the base of the member. The Tongue River Member contains several mappable subzones or beds. These include the informal "Medora Member", the Harmon, Hanson, and H lignite beds, and the paleosol Rhame bed (fig. 2). REFERENCES CITED Warwick, P.D., 1982, Geology of some lignite-bearing fluvial deposits [Paleocene], southwestern North Dakota: Raleigh, N.C. State University, M.S. thesis, 116 p.

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Oligocene White River Group Golden Valley Formation Eocene Tertiary Paleocene Fort Union Formation Sentienel Butte Member .4(-- HT lignite bed .-"Medora Member" Toungue River Member Harmon lignite bed [Hanson lignite bed H lignite bed Rhame paleosol bed Ludlow Member Cannonball Member Ludlow Member Upper Hell Creek Formation Cretaceous Fig. 2. Stratigraphy of exposed rocks in western North Dakota.

Table 1. Location, elevation, and thickness data for the measured sections. POINT LATITUDE LONGITUDE ELEVATION USGS TOPOGRAPHIC QUADRANGLE Timna, SECTION COUNTY ID (N) THIMMSS (ft) 1 46.64378 103.6692 DRY BULLION CREEK (7.5') BILLINGS 10 46.68183 103.6609 DRY BULLION CREEK (7.5') BILLINGS 11 46.67886 103.6512 DRY BULLION CREEK (7.5') BILLINGS 12 46.68800 103.6299 DRY BULLION CREEK (7.5') BILLINGS 13 46.69603 103.6281 DRY BULLION CREEK (7.5') BILLINGS 14 46.70442 103.6213 BULLION BUTTE (7.5') BILLINGS 15 46.69961 103.6048 BULLION BUTTE (7.5') BILLINGS 16 46.67869 103.6239 BULLION BUTTE (7.5') BILLINGS 17 46.70908 103.6011 BULLION BUTTE (7.5') BILLINGS 18 46.72153 103.6087 BULLION BUTTE (7.5') BILLINGS 19 46.72983 103.6083 BULLION BUTTE (7.5') BILLINGS 2 46.64528 103.6809 DRY BULLION CREEK (7.5') BILLINGS 20 46.73628 103.6099 BULLION BUTTE (7.5') BILLINGS 21 46.74561 103.6137 BULLION BUTTE (7.5') BILLINGS 22 46.75875 103.5920 CHIMNEY BUTTE (7.5') BILLINGS 23 46.77047 103.6089 CHIMNEY BUTTE (7.5') BILLINGS 24 46.76442 103.5956 CHIMNEY BUTTE (7.5') BILLINGS 25 46.78094 103.6089 CHIMNEY BUTTE (7.5') BILLINGS 26 46.78675 103.5973 CHIMNEY BUTTE (7.5') BILLINGS 27 46.79517 103.6021 CHIMNEY BUTTE (7.5') BILLINGS 28 46.80078 103.5927 CHIMNEY BUTTE (7.5') BILLINGS 29 46.79667 103.5770 CHIMNEY BUTTE (7.5') BILLINGS 3 46.64236 103.6756 DRY BULLION CREEK (7.5') BILLINGS 30 46.80508 103.5676 CHIMNEY BUTTE (7.5') BILLINGS 31 46.81208 103.5588 CHIMNEY BUTTE (7.5') BILLINGS 32 46.82206 103.5571 CHIMNEY BUTTE (7.5') BILLINGS 33 46.82725 103.5563 CHIMNEY BUTTE (7.5') BILLINGS 34 46.83486 103.5487 CHIMNEY BUTTE (7.5') BILLINGS 35 46.83928 103.5424 CHIMNEY BUTTE (7.5') BILLINGS 36 46.84239 103.5224 CHIMNEY BUTTE (7.5') BILLINGS 37 46.85031 103.5496 CHIMNEY BUTTE (7.5') BILLINGS 38 46.85772 103.5456 CHIMNEY BUTTE (7.5') BILLINGS 39 46.86664 103.5506 CHIMNEY BUTTE (7.5') BILLINGS 4 46.63944 103.6817 DRY BULLION CREEK (7.5') BILLINGS 40 46.87447 103.5723 CHIMNEY BUTTE (7.5') BILLINGS 41 46.83814 103.5099 CHIMNEY BUTTE (7.5') BILLINGS 41A 46.83600 103.5085 CHIMNEY BUTTE (7.5') BILLINGS 41B 46.83650 103.5097 CHIMNEY BUTTE (7.5') BILLINGS 41C 46.83889 103.5117 CHIMNEY BUTTE (7.5') BILLINGS 41D 46.83981 103.5123 CHIMNEY BUTTE (7.5') BILLINGS 41E 46.84011 103.5147 CHIMNEY BUTTE (7.5') BILLINGS 41F 46.84153 103.5171 CHIMNEY BUTTE (7.5') BILLINGS 42 46.84111 103.5028 CHIMNEY BUTTE (7.5') BILLINGS 43 46.85608 103.4990 TRACY MOUNTAIN (7.5') BILLINGS 44 46.86269 103.4913 TRACY MOUNTAIN (7.5') BILLINGS 45 46.87500 103.4641 FRYBURG NW (7.5') BILLINGS 46 46.87742 103.4804 FRYBURG NW (7.5') BILLINGS 47 46.88136 103.4860 FRYBURG NW (7.5') BILLINGS 48 46.88419 103.5073 MEDORA (7.5') BILLINGS 49 46.89044 103.5197 MEDORA (7.5') BILLINGS 5 46.65406 103.6756 DRY BULLION CREEK (7.5') BILLINGS 50 46.89500 103.5268 MEDORA (7.5') BILLINGS 51 46.89964 103.5407 MEDORA (7.5') BILLINGS 52 46.90517 103.5548 MEDORA (7.5') BILLINGS 53 46.89608 103.5544 MEDORA (7.5') BILLINGS

Table 1. Location, elevation, and thickness data for the measured sections. 54 46.88533 103.5510 46.92136 103.5588 56 46.93322 103.5610 57 46.93389 103.5794 58 46.93972 103.5851 59 46.80122 103.5620 6 46.65864 103.6717 46.79631 103.5515 61 46.78933 103.5428 62 46.80944 103.5828 63 46.81331 103.5964 64 46.82361 103.5978 46.82575 103.5820 66 46.71300 103.5802 67 46.70183 103.5746 68 46.70556 103.5488 69 46.71181 103.5292 7 46.66828 103.6703 46.70711 103.5216 71 46.71422 103.5417 72 46.70022 103.5536 73 46.69100 103.5454 74 46.68728 103.5412 46.67411 103.5139 76 46.68219 103.4962 77 46.68389 103.4975 78 46.67986 103.4944 79 46.67578 103.4939 8 46.67331 103.6642 46.66664 103.5091 81 46.66533 103.4876 82 46.66494 103.4798 83 46.64236 103.4931 84 46.62811 103.6707 46.62844 103.6603 86 46.61419 103.6426 87 46.62769 103.6450 88 46.62342 103.6181 89 46.62089 103.5991 46.68092 103.6616 46.62211 103.5954 91 46.62522 103.5956 92 46.62833 103.5859 93 46.62825 103.5741 94 46.63094 103.5505 46.61997 103.5370 96 46.61081 103.5198 MEDORA (7.5') MEDORA (7.5') MEDORA (7.5') MEDORA (7.5') MEDORA (7.5') CHIMNEY BUTTE (7.5') DRY BULLION CREEK (7.5') CHIMNEY BUTTE (7.5') CHIMNEY BUTTE (7.5') CHIMNEY BUTTE (7.5') CHIMNEY BUTTE (7.5') CHIMNEY BUTTE (7.5') CHIMNEY BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') DRY BULLION CREEK (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') ROCKY RIDGE (15') ROCKY RIDGE (15') ROCKY RIDGE (15') ROCKY RIDGE (15') DRY BULLION CREEK (7.5') BULLION BUTTE (7.5') ROCKY RIDGE (15') ROCKY RIDGE (15') ROCKY RIDGE (15') DRY BULLION CREEK (7.5') DRY BULLION CREEK (7.5') SPRING CREEK (7.5') DRY BULLION CREEK (7.5') DEEP CREEK NORTH (7.5') DEEP CREEK NORTH (7.5') DRY BULLION CREEK (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') BULLION BUTTE (7.5') DEEP CREEK NORTH (7.5') DEEP CREEK NORTH (7.5') BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS BILLINGS SLOPE SLOPE SLOPE SLOPE SLOPE SLOPE BILLINGS SLOPE SLOPE SLOPE SLOPE BILLINGS SLOPE SLOPE

Table 2. Lithologies used and their respective abbreviations. ABBREVIATION ALUV CLY CLY CARB CLY LIG CLY LYR W-SLT SD CLY SDY CLY SLT CLY SLTY COAL COAL CARB COAL CLY LIG LS MUD MUD CARB MUD LYR W-CLY MUD LYR W-COAL MUD LYR W-SLT NR SD SD CLY SD F SD LYR W-CLY SD LYR W-COAL SD LYR W-MUD SD SLTY SH SID SLST SLT LITHOLOGY ALLUVIUM CLAY CLAY CARBONACEOUS CLAY LIGNITIC CLAY LAYERED WITH SILT, SAND CLAY SANDY CLAY SILT CLAY SILTY COAL COAL CARBONACEOUS COAL CLAYEY LIGNITE LIMESTONE MUD MUD CARBONACEOUS MUD LAYERED WITH CLAY MUD LAYERED WITH COAL MUD LAYERED WITH SILT NO RECORD SAND SAND CLAYEY SAND FINE-GRAINED SAND LAYERED WITH CLAY SAND LAYERED WITH COAL SAND LAYERED WITH MUD SAND SILTY SHALE SIDERITE SILTSTONE SILT

SLT CARB SILT CARBONACEOUS SLT CLY SILT CLAYEY SLT LYR W-CLY SILT LAYERED WITH CLAY SLT LYR W-CLY LIG SILT LAYERED WITH CLAY,LIGNITE SLT LYR W-SD SILT LAYERED WITH SAND SLT SDY SILT SANDY SS SANDSTONE

Table 3. Measured section data. Sec. No. section number; thk. thickness; Bot. inrcpt bottom intercept; Prim. lith. primary lithology; Lith. mod. lithology modifier. Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CLY SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER HARMON SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD LYR W-SLT FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MUD LYR W-COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER

Table 3. Measured section data. SLT FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HARMON MUD CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prirmlith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER HARMON

Table 3. Measured section data. SS FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CLY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER ALUV FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY CARB FORT UNION TONGUE RIVER CLY COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. Iith. Lith mod. Fossils Formation/Member Bed/Zone SD LYR W-COAL FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD CLY YES FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON MUD CARB FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER SS YES FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER

Table 3. Measured section data. COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY YES FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB YES FORT UNION TONGUE RIVER CLY SDY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT SDY YES FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER HARMON SLT SDY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) BoL intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON

Table 3. Measured section data. CLY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER MUD LYR W-SLT YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER CLY SDY YES FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SD SLTY YES FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD LYR W-SLT YES FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY LIG FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-SD YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SLT LYR W-CLY LIG FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER CLY COAL FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER CLY SLTY YES FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. LIG FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone COAL FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SDY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT. UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER

Table 3. Measured section data. COAL CARB FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY LIG YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD LYR W-CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT CARB FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER SD SLTY YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB YES FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER MEDORA MUD LYR W-SLT FORT UNION TONGUE RIVER MEDORA CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY LIG FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-CLY YES FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD LYR W-SLT YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SD SLTY FORT UNION TONGUE RIVER CLY CARB YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SD LYR W-MUD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER

Table 3. Measured section data. LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone 41A CLY SDY FORT UNION TONGUE RIVER 41A CARB FORT UNION TONGUE RIVER 41A SLT LYR W-CLY FORT UNION TONGUE RIVER 41A CLY CARB FORT UNION TONGUE RIVER 41A SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone 41B MUD FORT UNION TONGUE RIVER 41B MUD LYR W-CLY FORT UNION TONGUE RIVER 41B SD LYR W-MUD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone 41D SLT FORT UNION TONGUE RIVER 41D CLY CARB FORT UNION TONGUE RIVER 41D CLY YES FORT UNION TONGUE RIVER 41D SS FORT UNION TONGUE RIVER 41D CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone 41E SD FORT UNION TONGUE RIVER 41E CLY CARB FORT UNION TONGUE RIVER 41E CLY FORT UNION TONGUE RIVER 41E CLY LYR W-SLT SD FORT UNION TONGUE RIVER 41E SD FORT UNION TONGUE RIVER 41E COAL CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone 41F CLY FORT UNION TONGUE RIVER 41F CLY CARB FORT UNION TONGUE RIVER 41F SLT LYR W-CLY FORT UNION TONGUE RIVER 41F MUD LYR W-SLT YES FORT UNION TONGUE RIVER 41F SD FORT UNION TONGUE RIVER 41F SLT FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MEDORA Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SD LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD YES FORT UNION TONGUE RIVER MEDORA CLY CARB FORT UNION TONGUE RIVER MEDORA SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER

Table 3. Measured section data. MUD LYR W-SLT FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER MEDORA SD FORT UNION TONGUE RIVER MEDORA SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SDY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLTY YES FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD LYR W-CLY YES FORT UNION TONGUE RIVER

Table 3. Measured section data. MUD FORT UNION TONGUE RIVER MEDORA SD LYR W-MUD FORT UNION TONGUE RIVER MEDORA CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT LYR W-SD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MEDORA SID FORT UNION TONGUE RIVER MEDORA SS FORT UNION TONGUE RIVER MEDORA CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD F FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SD LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER

Table 3. Measured section data. Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLST FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER HARMON LIG FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT YES FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY LYR W-SLT SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARS FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER MEDORA SLT LYR W-CLY FORT UNION TONGUE RIVER MEDORA SD FORT UNION TONGUE RIVER MEDORA SLT LYR W-CLY FORT UNION TONGUE RIVER MEDORA LIG FORT UNION TONGUE RIVER MEDORA CLY FORT UNION TONGUE RIVER MEDORA COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER 52' SS FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER ALUV FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER MEDORA CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY SLTY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MEDORA SS FORT UNION TONGUE RIVER MEDORA CLY LIG FORT UNION TONGUE RIVER MEDORA SLT LYR W-CLY FORT UNION TONGUE RIVER MEDORA LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MEDORA SLT LYR W-CLY YES FORT UNION TONGUE RIVER MEDORA LS FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MEDORA SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER

Table 3. Measured section data. SLT LYR W-SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Pdm.lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT LYR W-SD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SDY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MEDORA CLY FORT UNION TONGUE RIVER MEDORA SD LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone ALUV FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SDY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER MUD YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. SD F FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER CLY CARB YES FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT LYR W-SD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-SD YES FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MEDORA SD LYR W-MUD FORT UNION TONGUE RIVER MEDORA CLY FORT UNION TONGUE RIVER MEDORA CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER

Table 3. Measured section data. SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MEDORA MUD FORT UNION TONGUE RIVER MEDORA CLY YES FORT UNION TONGUE RIVER MEDORA Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone NR FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CLY SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER MEDORA SS FORT UNION TONGUE RIVER MEDORA CLY CARB FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER MUD LYR W-COAL YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone FORT UNION SENTINEL BUTTE HT SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER MEDORA SD FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. M. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER

Table 3. Measured section data. SD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER HARMON SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER HARMON SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone NR FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. Sec. No. Unit thk. (ft.) Bot intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone NR FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER MUD LYR W-SLT YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone ALUV FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed2one SD FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SH FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER

Table 3. Measured section data. SLT LYR W-SD FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY LYR W-SLT SD YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER LIG FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER

Table 3. Measured section data. SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone NR FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON Sec. No. Unit thk. (ft.) Bat. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER MUD LYR W-SLT YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER' COAL CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY LYR W-SLT SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H MUD FORT UNION TONGUE RIVER RHAME MUD FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER RHAME MUD CARB FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER RHAME SLT LYR W-CLY FORT UNION TONGUE RIVER MUD CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER H SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SS FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H SLT LYR W-CLY FORT UNION TONGUE RIVER RHAME SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone CARB FORT UNION TONGUE RIVER HARMON CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER RM SD LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD LYR W-SLT FORT UNION TONGUE RIVER HARMON SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER MUD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H CLY CARB FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER RHAME SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER RHAME SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD F FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HANSON MUD CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER H CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER RHAME SS FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT CLY FORT UNION TONGUE RIVER LS FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER FORT UNION TONGUE RIVER HANSON Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-SD FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER 30,00 SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON MUD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HANSON SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER H CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER RHAME COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD FORT UNION TONGUE RIVER Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone MUD LYR W-SLT FORT UNION TONGUE RIVER MUD LYR W-SLT FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER NR FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER LS YES FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER

Table 3. Measured section data. CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W--CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT YES FORT UNION TONGUE RIVER SLT SDY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB YES FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON SLT LYR W-CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HANSON SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER H CLY FORT UNION TONGUE RIVER RHAME Sec. No. Unit thk. (ft.) Bot. intrcpt (ft.) Prim. lith. Lith mod. Fossils Formation/Member Bed/Zone SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY YES FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SD SLTY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER SLT LYR W-CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER HARMON CLY CARB FORT UNION TONGUE RIVER COAL CARB FORT UNION TONGUE RIVER HANSON CLY LYR W-SLT SD FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER H CLY FORT UNION TONGUE RIVER CLY CARB FORT UNION TONGUE RIVER SS FORT UNION TONGUE RIVER COAL FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER RHAME CLY CARB FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER CLY FORT UNION TONGUE RIVER

~F,

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