U. S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY

STRUCTURE-CONTOUR MAPS OF THEPOWDER RIVER BASIN,

MONTANA AND WYOMING

By James E. Fox and Debra K. Higley

Pamphlet to accompanyOIL AND GAS INVESTIGATIONS CHART

OC-147-A

INTRODUCTION

The data set for formation bases and tops from which these maps were constructed was derived from the electric logs of 186 boreholes that penetrate Upper Cretaceous and older rocks. These logs are shown in 22 cross sections of the Powder River Basin (Fox, 1993a-d). The maps were pro­ duced by using the Interactive Surface Modeling (ISM) pro­ gram of Dynamic Graphics, Inc. Values at some of the data localities might not be as closely related to the contours as on a hand-contoured map due to the mathematical constraints of the mapping program.

REFERENCES CITED

Fox, J.E., 1993a, Stratigraphic cross sections A-A through F-F showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Montana and Wyoming: U.S. Geological Survey Oil and Gas Investigations Chart OC-135.

Fox, J.E., 1993b, Stratigraphic cross sections G-G through L-L showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Wyoming: U.S. Geological Survey Oil and Gas Investigations Chart OC-136.

Fox, J.E., 1993c, Stratigraphic cross sections M-M" through R-R showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Wyoming: U.S. Geolog­ ical Survey Oil and Gas Investigations Chart OC-137.

Fox, J.E., 1993d, Stratigraphic cross sections S-S' through V V showing electric logs of Upper Cretaceous and older rocks, Powder River Basin, Montana and Wyo­ ming: U.S. Geological Survey Oil and Gas Investigations Chart OC-138.

GENERALIZED STRATIGRAPHIC NOMENCLATURE FOR THE POWDER RIVER BASIN. Unconformities are indicated by gray shading and (or) jagged lines. Abbreviations: Fm., Formation; Gp., Group; Mem., Member; Ls., Limestone; Sh., Shale; and Ss., Sand­ stone.

SYSTEM/ SERIES

u o

DC ODCU Q. Q.13

0

DC O

POWDER RIVER BASIN

WEST EAST

Fox Hill* S«.

Mesaverde Formation

Lewis Shale

Shannon Ss. Mem.

Steels (Cody) Shale

Nlobrara Fm. .XS/VWV

Sage Breaks Sh.

Wall Creek Mem."WVVVVV^AA^

Belle Fourche Mem, 72ndWall Creek tend7!

Belle Fourche Mem.Mowry Shale

Muddy Ss. /WVS/N

Thermopolis Sh.

Fell River Ss. /W^v'S^vLakota Fm.

Morrison Fm.

Lance Fm. | Hell Creek FmFox Hills Ss.

Plerre Shale

Nlobrara Fm. ./N^/SXSag* Breaks Main

CarllleSh. | Turner

Pool fcreek MamGreenhorn Fm.

Belle Fourche Sh.

Mowry Shele

Newcastle Ss. S/^WS/VSSkull Creek Sh.

Fall River Ss. | E «. - ' «5

Lakota Fm. I .E *

Morrison Fm.

Borehole logs used in mapping

[Following is a list of borehole logs used to construct the structure-contour maps of this report. These boreholes were also used to construct stratigraphic cross sections A-A' through V-V, published as U.S. Geological Survey Oil and Gas Investigations Charts OC 135-138 (Fox, 1993a-d)]

No.

Al

A2 A3

A4 A5

A6

B7 B8

B9

BIO Bll

B12B13

C14

C15

C16 C17

CIS C19C20

C21C22 C23

C24

D25 D26 D27 D28 D29

D30

D31

D32 D33

D34

Name

King Resources KRC 1-34 Crow

Vessels 1 Shell Federal King Resources 1-16

Amerada State Mobil 1 Kraft Chandler 1 Dutch

Gulch Gov't. Superior Traub Land

and Livestock 1

Shell 11 Crow Mountain Minerals 14-

29 Federal Fordyce Royal Resources 1 -29

Federal-Kendrick Gulf I Bates Pure Donnell 1

Portwine Gulf 1 BoyleDavis 1 Gov't. -

Hagman

Shell 1 Gov't.Wamsley

Amerada 1 Gov't.Cranston

Shell 1 Clear Creek Davis 1 Wallick-

Dobrenz Jenkins 1 Jenkins Mesa 1 USA Me BrideDavis 1 Federal

Rogers Trigg 1 Gov't. HumbleGary 23-1 Bruner Great Western 1 Gov't.

1 Anthony Union 1 Gov't.-

Newton

Shell 1 Demple Davis 1 Dodd Amerada 1 Boland Davis 1 Clarke-Federal Glen Dow 1 Gov't. -

Kirby Goodstein 1

Goodstein-Mobil Far West Trading 1

Federal Gary 1 Federal- Beagle Oil Resources 1 Trail

Creek Grazing Mule Creek Oil 1-

1212

LocationCross section A-A 1

NE%NB4 sec. 34, T. 8 S., R. 38 E.

NEV4SEV4 sec. 12, T. 8 S., R. 41 E. SEWSEU sec. 16, T. 8 S., R. 43 E.

NEV4NB4 sec. 1 1, T. 8 S., R. 46 E. SEMSWV4 sec. 10, T. 8 S., R. 48 E.

NWWSWM sec. 18, T. 8 S., R. 50 E.

Cross section B-B'SEUSEU sec. 26, T. 9 S., R. 37 E. NEV4NE% sec. 29, T. 58 N., R. 81 W.

SW'/iSW^ sec. 21, T. 58 N., R. 79 W.

NEV4NWH sec. 1 1, T. 9 S., R. 45 E. SWUSW',4 sec. 5, T. 9 S., R. 50 E.

NE'/SSW^ sec. 4, T. 8 S., R. 52 E.NWV4NWH sec. 15, T. 9 S., R. 56 E.

Cross section C-CSWV4SWM sec. 13, T. 57 N., R. 83 W.

NEV4SEV4 sec. 17, T. 57 N., R. 79 W.

NWV4SEK sec. 1 1, T. 57 N., R. 78 W. SW'^SW1/* sec. 3, T. 57 N., R. 75 W.

NE^SEV* sec. 35, T. 58 N., R. 74 W. SW^SWVi sec. 23, T. 9 S., R. 50 E.SEUSWV4 sec. 23, T. 58 N., R. 71 W.

C Lot 14 sec. 31,T. 9 S., R. 53 E.SWMNEV4 sec. 23, T. 9 S., R. 54 E. SWKNEH sec. 35, T. 9 S., R. 57 E.

NW^SWVi sec. 23, T. 9 S., R. 59 E.

Cross section D-D'SEViNW1̂ sec. 22, T. 55 N., R. 85 W. NWUNW1/* sec. 14, T. 55 N., R. 82 W. C Lot 8, sec. 19, T. 56 N., R. 79 W. SEV4NEW sec. 27, T. 56 N., R. 77 W. NE'/iNE'/S sec. 18, T. 56 N., R. 75 W.

Tract 56 sec. 36, T. 57 N., R. 74 W.

NW%NWH sec. 25, T. 57 N., R. 72 W.

NWUNW1/* sec. 17, T. 57 N., R. 70 W. SV4NE% sec. 7, T. 57 N., R. 69 W.

SWHNWH sec. 12, T. 57 N., R. 68 W.

County

Bighorn County, Mont.

Bighorn County, Mont. Bighorn County, Mont.

Powder River County, Mont. Powder River County, Mont.

Powder River County, Mont.

Bighorn County, Mont. Sheridan County, Wyo.

Sheridan County, Wyo.

Powder River County, Mont. Powder River County, Mont.

Powder River County, Mont.Carter County, Mont.

Sheridan County, Wyo.

Sheridan County, Wyo.

Sheridan County, Wyo. Campbell County, Wyo.

Campbell County, Wyo. Powder River County, Mont.Campbell County, Wyo.

Powder River County, Mont.Powder River County, Mont. Carter County, Mont.

Carter County, Mont.

Sheridan County, Wyo. Sheridan County, Wyo. Sheridan County, Wyo. Sheridan County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo.

Crook County, Wyo.

E35

E36

E37 E38 E39 E40

E41

E42 E43

F44 F45F46F47F48 F49

F50F51

G52 G53

G54

G55

G56G57 G58

G59

G60

G61

H62

H63 H64H65

H66

H67 H68 H69

H70 H71

Anschutz-Moncrief-Sohio 1 Fairbanks

Anschutz 1 Faddis- Kennedy

Cleary 1-33 Federal Brinkerhoff 2456-1 Amarillo 1 Dow State Texas Nat. 1-9

Swineheart Davis 1 Federal

Snyder Kingwood 1 Federal Davis 1 Shannon

Reasor Tarbet 1 Austral Buell 1Royal l-27Rietveld Trigood Ingram AlMKMParnell 1-A Reading and Bates 2

Norfolk Kirkwood 42X-35Vickers 1 Chenoweth

Mapco 1-30 Federal

Federal Texaco 1 Govt.

O'Connell NCT 1 Davis 1-X Skyline-

Federal Texaco 1 AdonGoodstein 14-1 Gov't. Davis 1 Hatfield-

Federal Brehm Gov't. Kewanee

1 Pan Am 1 N. Prairie

Creek Murphy 1 Clayton

State

Woods 8-1 Skyline Hakert-Federal

Davis 1 Flying-Federal Davis 1 Abko-FederalGoodstein 1

Goodstein-MKM Webb24-l Webb-

Federal Sinclair 1 Grams Davis 1 Josephine Chorney 13-25 Alien-

Fee Gary 1 ES Adams Sinclair 1 Lawrence

Cross section E-E'NWV4NW14 sec. 3, T. 53 N., R. 82 W.

NWV4NEV4 sec. 33, T. 55 N., R. 80 W.

NEV4NEV4 sec. 33, T. 55 N., R. 79 W. NW1/4NW 1/4 sec. 24, T. 55 N., R. 76 W. SEV4SWV4 sec. 25, T. 55 N., R. 74 W. SEV4SEV4 sec. 9, T. 56 N., R. 71 W.

SE!4NWV4 sec. 5, T. 55 N., R. 70 W.

NWV4SEV4 sec. 19, T. 56 N., R. 69 W. SW/4 Tract 51 sec. 26, T. 57 N., R. 69 W.

Cross section F-F'SWV4NWV4 sec. 4, T. 51 N., R. 83 W. SEKNWV4 sec. 9, T. 52 N., R. 82 W.NE1/4NW'/4 sec. 27, T. 54 N., R. 79 W. E'/iSE1/* sec. 9, T. 54 N., R. 77 W.NWl/4SWU sec. 24, T. 54 N., R. 74 W. SEWNWVi sec. 10, T. 54 N., R. 71 W.

SE!/4NEV4 sec. 35, T. 56 N., R. 69 W.NWV4NEV4 sec. 30, T. 56 N., R. 68 W.

Cross section G-GNWV4SE'/4 sec. 30, T. 50 N., R. 82 W. SEWSEVi sec. 8, T. 51 N., R. 80 W.

SWV4NWV4 sec. 21, T. 53 N., R. 77 W.

SEUSEV4 sec. 22, T. 52 N., R. 74 W.

NW1/4NE1/4 sec. 2, T. 52 N., R. 72 W.SEl/4NW!/4 sec. 14, T. 53 N., R. 72 W. SW^SW1/* sec. 20, T. 53 N., R. 70 W.

NEViSEV* sec. 32, T. 54 N., R. 69 W.

SWViSEVi sec. 1, T. 54 N., R. 69 W.

SWV4SW1/4 sec. 18, T. 55 N., R. 67 W.

Cross section H-ffSE1/4NE1/4 sec. 8, T. 49 N., R. 81 W.

SE l/4SE'/4 sec. 14, T. 50 N., R. 79 W. NEV4NEV4 sec. 20, T. 51 N., R. 78 W.SEl/4SEV4 sec. 24, T. 51 N., R. 77 W.

NE1/4NE1/4 sec. 24, T. 51 N., R. 75 W.

SW1/4SE'/4 sec. 28, T. 51 N., R. 72 W. SW'/4SEV4 sec. 27, T. 52 N., R. 70 W. NWV4SWV4 sec. 25, T. 53 N., R. 69 W.

NEV4NEV4 sec. 19, T. 54 N., R. 67 W. NW'/4NE'/4 sec. 10, T. 54 N., R. 65 W.

Sheridan County, Wyo.

Sheridan County, Wyo.

Sheridan County, Wyo. Campbell County, Wyo. Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo.

Johnson County, Wyo. Johnson County, Wyo.Sheridan County, Wyo. Sheridan County, Wyo.Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.Crook County, Wyo.

Johnson County, Wyo. Johnson County, Wyo.

Johnson County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Crook County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo. Johnson County, Wyo.Johnson County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo.

Crook County, Wyo. Crook County, Wyo.

Cross section /-/'NEWSEtf sec. 26, T. 45 N., R. 82 W. NWViNWVi sec. 18, T. 47 N., R. 79 W. NE'/iNE1/* sec. 23, T. 48 N., R. 78 W.

172 Embar 1 Gov't.173 Phillips 1 Faxla-A174 Davis 1 Burness-

Federal175 Chevron 1 Chevron NWViSW'/i sec. 34, T. 49 N., R. 76 W.

Ranger Federal176 Union 1 E 34 Sparta SW^NWU sec. 34, T. 50 N., R. 74 W.

Federal177 Shell 16-1 State NWV4NWV4 sec. 16, T. 50 N., R. 73 W.178 Davis 1 Kluver NE^NE 1/* sec. 24, T. 50 N., R. 72 W.179 Tiger 1 Federal- SWV4SW/4 sec. 17, T. 50 N., R. 70 W.

Halladay180 Midroc 32-6 Woolsey SWV4NE'>4 sec. 6, T. 50 N., R. 69 W.181 Petroleum Inc. 1 NWV4NWV4 sec. 20, T. 51 N., R. 68 W.

Forney182 Gary 1-A Federal NEV4SWV4 sec. 15, T. 52 N., R. 68 W.183 Terry 1 Peterson SWV4SW 1/4 sec. 25, T. 52 N., R. 67 W.184 Ozark 1 NW1/4SE1/4 sec. 19, T. 53 N., R. 66 W.

__________Zimmerschied-A___________________________ ____________________________Cross section J-f_____ J85 Roberts 1 Mobil SWV4NE»/4 sec. 8, T. 43 N., R. 81 W.

RisslerJ86 Shell 22X-23 Gov't. SEV4NWV4 sec. 23, T. 44 N., R. 80 W. J87 Shell 13X-1 IB NWV4SWV4 sec. 11, T. 44 N., R. 79 W.

Montgomery J88 Publishers 1 -14 NWV4SEV4 sec. 14, T. 47 N., R. 78 W.

FederalJ89 Pure 1 Unit NEV4NWV4 sec. 20, T. 48 N., R. 76 W. J90 Nat. Coop Ref. 1 SEVtSEV* sec. 31, T. 49 N., R. 74 W.

Federal Barlow J91 Anschutz 1 Anadarko NEV4SEV4 sec. 19, T. 49 N., R. 72 W.

Federal J92 Nat. Coop Ref. 1 NWV4SEV4 sec. 15, T. 49 N., R. 70 W.

Gov't.J93 Arco 1 Lester SWV4NW/4 sec. 35, T. 50 N., R. 68 W. J94 Mule Creek 1-4433 SEV4SEV4 sec. 33, T. 52 N., R. 66 W.

__________Griffith________________________________ ____________________________Cross section K-K______K95 Halbert 1 Federal SE'/4SWl/4 sec. 22, T. 42 N., R. 80 W.

Wheatley K96 Woods 1 Sullivan SWV4NWV4 sec. 15, T. 43 N., R. 77 W.

Federal K97 Anadarko A-1 Pistol NEV4SEV4 sec. 22, T. 45 N., R. 76 W.

PointK98 Inexco 10 USA-Pre 1 SWV4SWV4 sec. 35, T. 47 N., R. 75 W. K99 Royal Resources 1 -27 NE1/4NWI/4 sec. 27, T. 47 N., R. 74 W.

Throne K100 Royal Resources 1-22 NWV4NWU sec. 22, T. 47 N., R. 73 W.

Romaker K101 Reading and Bates 1 SW1/4NWI/4 sec. 14, T. 47 N., R. 72 W.

LyndeK102 Davis 1 Dunlap SE1/4SE1/4 sec. 18, T. 48 N., R. 71 W. K103 British-American 1 SWV4SWV4 sec. 5, T. 47 N., R. 70 W.

Gov't. KimesK104 Mobil F43-4-P Bishop NEV4SEV4 sec. 4, T. 47 N., R. 69 W. K105 Hill 1-6 Bridwell SEV4NWV4 sec. 6, T. 48 N., R. 67 W.

FederalK106 Brehm 1 Nicolen NE^NE1/* sec. 18, T. 49 N., R. 66 W.

K107 Carnell 1 Gov't. NEV4NWW sec. 26, T. 50 N., R. 65 W.

Johnson County, Wyo. Johnson County, Wyo. Johnson County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo. Crook County, Wyo.

Crook County, Wyo. Crook County, Wyo. Crook County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo. Johnson County, Wyomng

Johnson County, Wyo.

Johnson County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Crook County, Wyo. Crook County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo. Campbell County, Wyo.

Campbell County, Wyo. Weston County, Wyo.

Crook County, Wyo. Crook County, Wyo.

L108

L109

L110Llll

L112

L113

L114 L115

M116 M117

M118

M119M120

N121

N122

N123N124

N125

N126N127

N128

O129 O130

O131

O132 O133O134 O135 O136

P137P138PI 39 P140

P141P142

P143

PI44

P145

True 24-23 Broyles Federal

Mitchell 1 Taylor Ranch

Miami 1 CamblinRoyal Resources 1 -30

Southland Royalty Federal

Superior 1 Chorney Gov't.

Coquina 1 ReneFederal

Echo 34-14 Keeline Vaughn 1 Mated

Sinclair 1 Wind Creek Amoco 1 Antelope

State Kerr-McGee 1

Federal- Amerada Yates 1 Reno FlatsKing Res. 1-16

Conoco State

Conoco 1 Spring Creek

Texaco 2 Putnam Gov't.

Apache 1 Gov't.- WinnDavis 1 Federal-

Keeline Farmers 1 Sapphire-

Miller Sinclair 1 Moore Schlaikjer 1-25

Webster Ozark 1 Federal

Tesoro 11X23 Gov't. Superior 1 Gov't.

Tracey Champlin 1 Hartley

Federal Woods 1 Dilts Federal Gose 1 Union TexasRochelle 1 Gov't. Provident 1 Malloy Champlin 1

Kuemmerle

Davis 1 SteinerInexco 1 USA 42Dynaco 1 State Chandler 1 Skyline-

Webb Federal Grynberg 1 Gov't.True 22-27 Grynberg

Gov't. Tenneco 1 USA-

McCamly Winkler 1 Engle

Ranch Smith 1 Gov't.

Cross section L-LSEV4SWV4 sec. 23, T. 4 1 N., R. 79 W.

SE1/4SE1/4 sec. 9, T. 42 N., R. 76 W.

NW'/iNW1/* sec. 4, T. 43 N., R. 75 W.NW^NW^ sec. 30, T. 45 N., R. 73 W.

NE'/iNE1/* sec. 30, T. 46 N., R. 72 W.

NEWNE1/* sec. 18, T. 46 N., R. 69 W.

SW1ASE1A sec. 14, T. 46 N., R. 68 W. SW^SE1/* sec. 2, T. 47 N., R. 66 W.

Cross section M-M1SEI/4SW1/4 sec. 17, T. 40 N., R. 76 W. SW'^SW'/i sec. 16, T. 40 N., R. 75 W.

NW/4SWV4 sec. 29, T. 41 N., R. 73 W.

NW^NW1/* sec. 6. T. 42 N., R. 72 W.NW^SE1/* sec. 16, T. 44 N., R. 71 W.

Cross section N-N*NEV4NEV4 sec. 15, T. 41 N., R. 72 W.

NW1/4NTE 1/4 sec. 25, T. 43 N., R. 71 W.

NE'/4NEl/4 sec. 21. T. 44 N., R. 70 W.NE'/iSE1/* sec. 1, T. 44 N., R. 69 W.

SWV4SEV4 sec. 22, T. 45 N., R. 67 W.

SEVtSEV* sec. 10, T. 46 N., R. 66 W. SWV4SWV4 sec. 25, T. 47 N., R. 66 W.

NWWSWW sec. 14, T. 47 N., R. 64 W.Cross section O-O'

NWWNWVi sec. 23, T. 38 N, R. 78 W. SEV4NWV4 sec. 26, T. 38 N., R. 75 W.

SW/4NEV4 sec. 1 1, T. 38 N., R. 73 W.

NE'/iSE1/* sec. 21, T. 40 N., R. 71 W. SE'4SE% sec. 18, T. 42 N., R. 70 W.NWV4SEU sec. 1, T. 43 N., R. 69 W. SW/4NEV4 sec. 1 1, T. 44 N., R. 66 W. NE'/4SW14 sec. 3, T. 45 N., R. 65 W.

Cross section P-P'NE14NEV4 sec. 7, T. 37 N., R. 72 W.SEV4SEV4 sec. 10, T. 38 N., R. 70 W.NWV4NWV4 sec. 16, T. 40 N., R. 69 W. NWViNWVi sec. 2, T. 41 N., R. 69 W.

NE'/4NWV4 sec. 25, T. 43 N., R. 68 W.SEV4NWV4 sec. 27, T. 43 N., R. 66 W.

SEV4NEV4 sec. 3 1 , T. 43 N., R. 64 W.

SW'/4NE'/4 sec. 20, T. 45 N., R. 62 W.

NE'/iSE1̂ sec. 15, T. 44 N., R. 61 W.

Johnson County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Weston County, Wyo. Weston County, Wyo.

Converse County, Wyo. Converse County, Wyo.

Converse County, Wyo.

Campbell County, Wyo.Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.Campbell County, Wyo.

Weston County, Wyo.

Weston County, Wyo. Weston County, Wyo.

Weston County, Wyo.

Natrona County, Wyo. Converse County, Wyo.

Converse County, Wyo.

Converse County, Wyo. Campbell County, Wyo.Campbell County, Wyo. Weston County, Wyo. Weston County, Wyo.

Converse County, Wyo.Converse County, Wyo.Converse County, Wyo. Campbell County, Wyo.

Weston County, Wyo.Weston County, Wyo.

Weston County, Wyo.

Weston County, Wyo.

Weston County, Wyo.

Q146 Q147 Q148 Q149Q150

Q151

Q152Q153

Q154Q155

R156 R157

R158 R159

R160 R161 R162

R163 R164

R165

R166

S167

S168 S169 S170

S171 S172 S173S174

S175

T176T177 T178

T179 T180 T181

T182 T183

T184

Davis 1 Vollman Felmont 1-30 Federal Felmont 1 Meisner Inexco 1 FEE-34Skyline 1 Diamond

Shamrock Int. Nuc.-King

Resources 1 Gov't.- Howk

Cosden 1-AGov't.Belco 1A-36

Morrissey Shell 3 1-16 St.Reeves-Truchot-Ford

l-26Gov't.

Continental 1 McGarth Clinton 1 Federal

Jensen/Mark Exxon 1 Badger Clinton 1 Federal

Woodman Samedan 1 Hildebrand Inexco 1 1 USA Int. Nuclear/King Res.

1 Alexander Ohio 1 Gov't. True 1 Gov't.

Robertson HLM/LM Perry 1

Federal Gary 1 Federal-Cote

Humble 1 Gov't. E. Garrett

Humble 1 Hornbeck Humble 1 Carey McCulloch 1 Gov't.

Partridge Sinclair 1 Joss Texaco Joss Trust-A Republic 1 KrejeiVan Norman 1 -23

Federal Coronado 1 Dewey-

Rose Gov't.

Benedum 1 BixbySaturn 1 Powell McCulloch 1 Gov't.

Partridge Helis22-18HatCreek Helis21-28HatCreek Goodstein 23-1

Kli nginsmith- Joss Tenneco 1 Fluent Coronado 1 Bradshaw-

Gov't. Arrowhead 32- 1 8

Federal

Cross section Q-Q'NWViSW'/i sec. 22, T. 36 N., R. 73 W. NEV4SEV4 sec. 30, T. 36 N., R. 71 W. NW14NW/4 sec. 10, T. 35 N., R. 70 W. NE'/iNE1/* sec. 1, T. 37 N., R. 70 W.SWViSW'A sec. 20, T. 39 N., R. 68 W.

SEV4SWV4 sec. 33, T. 40 N., R. 67 W.

NW1/4SW1/4 sec. 3, T. 40 N., R. 66 W.SEViSWU sec. 36, T. 42 N., R. 64 W.

NWV4NEV4 sec. 16, T. 42 N., R. 62 W.NW1/4NW1/4 sec. 26, T. 43 N., R. 61 W.

Cross section R-R'NW1/4SW1/4 sec. 15, T. 34 N., R. 78 W. SE'/4SE'/4 sec. 8, T. 35 N., R. 76 W.

NWV4SEV4 sec. 31, T. 36 N., R. 75 W. SWUSWVi sec. 13, T. 34 N., R. 76 W.

NEV4NEV4 sec. 26, T. 34 N., R. 73 W. SE'/iSEW sec. 26, T. 36 N., R. 69 W. NEV4NEV4 sec. 33, T. 38 N., R. 67 W.

SWWSWW sec. 1 , T. 38 N., R. 66 W. SWV4SWV4 sec. 1 1, T. 39 N., R. 65 W.

SE1/4SE'/4 sec. 20, T. 41 N., R. 62 W.

NEV4SWV4 sec. 29, T. 42 N., R. 61 W.Cross section S-S'

NWV4NEV4 sec. 26, T. 37 N., R. 76 W.

SW/4SWV4 sec. 16, T. 36 N., R. 74 W. NEV4NWV4 sec. 3, T. 33 N., R. 74 W. SW/4NEV4 sec. 32, T. 32 N., R. 70 W.

NWV4NW4 sec. 21, T. 33 N., R. 67 W. NEUSEV4 sec. 34, T. 36 N., R. 67 W. SEV4NW/4 sec. 28, T. 37 N., R. 64 W.SWV4NEV4 sec. 23, T. 40 N., R. 63 W.

NWV4NWV4 sec. 24, T. 41 N., R. 61 W.

Cross section T-TSWV4NWW sec. 29, T. 33 N., R. 74 W.SEV4SEV4 sec. 6, T. 32 N., R. 72 W. SW'/4NE'/4 sec. 32, T. 32 N., R. 70 W.

SEV4NWV4 sec. 18, T. 34 N., R. 66 W. NE1/4NWV4 sec. 28, T. 35 N., R. 66 W. SWV4SEV4 sec. 23, T. 34 N., R. 66 W.

NWViSW1̂ sec. 1, T. 36 N., R. 63 W. SWV4SEV4 sec. 35, T. 38 N., R. 61 W.

SWWNEVi sec. 18, T. 39 N., R. 61 W.

Converse County, Wyo. Converse County, Wyo. Converse County, Wyo. Converse County, Wyo.Converse County, Wyo.

Converse County, Wyo.

Niobrara County, Wyo.Weston County, Wyo.

Weston County, Wyo.Weston County, Wyo.

Natrona County, Wyo. Converse County, Wyo.

Converse County, Wyo. Converse County, Wyo.

Converse County, Wyo. Converse County, Wyo. Converse County, Wyo.

Niobrara County, Wyo. Niobrara County, Wyo.

Weston County, Wyo.

Weston County, Wyo.

Converse County, Wyo.

Converse County, Wyo. Converse County, Wyo. Converse County, Wyo.

Converse County, Wyo. Niobrara County, Wyo. Niobrara County, Wyo.Niobrara County, Wyo.

Weston County, Wyo.

Converse County, Wyo.Converse County, Wyo. Converse County, Wyo.

Niobrara County, Wyo. Niobrara County, Wyo. Niobrara County, Wyo.

Niobrara County, Wyo. Niobrara County, Wyo.

Niobrara County, Wyo.

Cross section U-UU185 Gulf 1 Boyle NE^SW1/* sec. 4, T. 8 S., R. 52 E.(B12)Ul86 Sam Gary 1 Federal- NWViNWV* sec. 17, T. 57 N., R. 70 W.(D32) BeagleU187 Reading and Bates 2 SEV4NWW sec. 10, T. 54 N., R. 71 W.(F49) NorfolkUl 88 Davis 1 Josephine SW1/4SE>/4 sec. 27, T. 52 N., R. 70 W.(H68)U189 Nat. Coop Ref. 1 NW1/4SE1/4 sec. 15. T. 49 N., R. 70 W.(J92) Gov't.U190 Coquina 1 Rene NE^NE1/* sec. 18, T. 46 N., R. 69 W.(LI 13) FederalU191 Rochelle 1 Gov't. NW 1/4SE1/4 sec. 1, T. 43 N., R. 69 W.(0134)U192 Cobb Superior 1 Dull SEViSE1/* sec. 5, T. 40 N., R. 68 W.

CenterU193 True 1-A Gibbs NWViSWU sec. 9, T. 37 N., R. 66 W. U194 Marathon 1 Lance NWV4SWV4 sec. 12, T. 35 N., R. 66 W.

Creek WestU195 Continental 1 Lance NEV4NWV4 sec. 1, T. 34 N., R. 64 W.

__________Creek_________________________________ ____________________________Cross section V-V______V196 Shell 11 Crow SEV4SEV4 sec. 26, T. 9 S., R. 37 E.(B7)V197 Shell 1 Demple SEUNWV4 sec. 22, T. 55 N., R. 85 W.(D25)V198 Austral Buell 1 SE!4NWVi sec. 9, T. 52 N., R. 82 W.(F45)VI99 Chevron N. Wyo. NE1/4SW1/4 sec. 24, T. 50 N., R. 82 W.

Land County 1V200 Embar 1 Gov't. NE1/4SE1/4 sec. 26, T. 45 N., R. 82 W. (172)V201 Shell 13X-1 IB NW'/tSWV* sec. 11, T. 44 N., R. 79 W. (J87) MontgomeryV202 Shell Gov't. 41X-34 NE1/4NE1/4 sec. 34, T. 43 N., R. 78 W. V203 Sinclair 1 Wind Creek SEUSW1/* sec. 17, T. 40 N., R. 76 W. (M116)V204 Superior 1 Gov't. SEV4NWV4 sec. 26, T. 38 N., R. 75 W. (O130) Tracey V205 Humble 1 Hornbeck SW'/iSW'/i sec. 16, T. 36 N., R. 74 W.(5168)V206 Humble 1 Carey NEV4NW1/* sec. 3. T. 33 N., R. 74 W.(5169)

Powder River County, Mont.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Campbell County, Wyo.

Converse County, Wyo.

Niobrara County, Wyo. Niobrara County, Wyo.

Niobrara County, Wyo.

Bighorn County, Mont.

Sheridan County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo.

Johnson County, Wyo. Converse County, Wyo.

Converse County, Wyo.

Converse County, Wyo.

Converse County, Wyo.