Bedrock geologic map of the Devils Playground quadrangle, Sweetwater County, Wyoming

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TbBm TbBu TbCl TbA TbCm TbCu TbDm TbDl TbE TbE TbA TbDu TbA unmapped TbBu TBi TbA TbA TbDl TbDm TbE TbDu TBi TBi TbBl TbCm TbCl TbBl TbCl TbBm TbBl TbE TbDu TbDm TbDl TbCu TbCm TbCl TbBm TbBl TbBm TbBu TbCl TbBu TbDu TbCu TbCm TbBl m m 1 1 SC_LS SCLS SHL_S HFT SC LS SHLS HFT LTLS ULS LTLS BBI ULS LTLS HFT SHLS SCLS ULS BELS BBI BBI BELS HFT LTLS ULS SHLS SCLS SCLS SHL_S HFT LTL_S ULS BE LS BBI BELS ~BBS ~B BS ~B_BS ~BBS

GEOLOGIC MAP UNITS

DISCLAIMERS

U sers of these ma ps are ca utioned about usin g the da ta at sca les differen t tha n those at which the ma ps were com piled— usin g this da ta at a larger sca le will not provide grea ter a ccuracy,a n d in fa ct,it is a m isuse of the da ta.

T he W yom in g State Geologica l Survey (W S GS ) an d the State of W yom in g m a kes no represen tation or wa rran ty, expressed or im plied, rega rdin g the use, accuracy, or com pleten ess of the da ta presen ted herein , or from a m a p printed from these da ta; nor sha ll the act of distribution constitute an y such wa rran ty. The W S GS does not gua ran tee these digital da ta herein , or ma p printed from these da ta, to be free of errors or in a ccuracies.

T he W S GS an d the State of W yom in g discla im s an y responsibility or lia bility for in terpretations from this digital da ta or ma p printed from these digital da ta, or decisions ba sed thereon. T he W S GS an d the State of W yom in g retain s an d does not wa ive sovereign im m un ity.

T he use of or referen ce to tradem a rks, trade na m es, or other product or com pan y na m es in this product is for descriptive or in forma tiona l purposes, or is pursua n t to licen sin g a greem en ts between the W S GS or the State of W yom in g an d softwa re or ha rdwa re developers/ven dors, an d does not im ply en dorsem en t of those products by the W S GS or the S tate of W yom in g.

KEY TO MEASURED

SECTIONS

(blue indicates sections shown on this m ap)

Map reference Name of measured section Reference sources *

a R eferen ce S ection,T win Buttes Mem ber Appen dix 2,T able 18 (Northeast S age Creek Moun tain )

b S outhwest S age Creek Moun tain Appen dix 5,T able 20 c S outhwest Cedar Moun tain Appen dix 3,T able 19 d T ype S ection,T urtle Bluff Mem ber Appen dix 4,T able 19 (W est Cedar Moun tain)

e S outheast CedarMoun tain Appen dix 6,T able 21 f T ype S ection,T win Buttes Mem ber Appen dix 1,T able 17 (Southeast T win Buttes)

g Northeast Hickey Mountain T able 22 h Northeast S age Creek Moun tain T able 23 i S outh CedarMountain T able 25 j North CedarMountain T able 24 k Northeast CedarMoun tain T able 27 l Northeast Mass Mountain T able 26

m Northwest Black Moun tain T able 29

n Northwest T win Buttes T able 28 * R efer to W yom in g S tate Geological S urvey R eport of Investigation s 57 (2007).

ABBREVIATIONS FOR MARKER UNITS

(red in dicates un its shown on this m ap)

BBI Base of Bishop Conglom erate

BRGB Behun in R eservoirgypsum bed

BELS Basal E lim estone

ULS U pperwhite lim estone

BBS Basal blue sheet san dstone

~BBS Approxim ate level of Basal blue

sheet sandstone

HRL Hickey R eservoir lim estone

LTLS Lonetree lim estone

HFLS Hen rys Fork lim estone

HFT Hen rys Fork tuff

BFLS Burnt Fork lim estone

HRRB Horse R anch red bed

HMLS Hickey Moun tain lim estone

SHLS S oap Holes lim estone

BKLS Butcher K nife lim estone

WRLS W hiskey R eservoir lim estone

SCLS S age Creek lim estone

BISHOP CONGLOMERATE (Oligocen e)

BRIDGER FORMATION (early and m iddle Eocene)

Turtle Bluff Member (BridgerE) (middle Eocene)

Twin Buttes Member (“Upper Bridger”

orBridgerC an d D) (m iddle Eocene)

upperBridgerD m iddle Bridger D lowerBridgerD upperBridgerC m iddle Bridger C lowerBridgerC

Blacks Fork Member (“Lower Bridger”

or BridgerA an d B)(early an d m iddle Eocen e)

upperBridgerB

m iddle Bridger B

lowerBridgerB

Bridger A

NOTICE TO USERS OF W YOMING STATE GEOLOGI CAL SURVEY INFORMATION

Most information produced by the W yom ing State Geological Survey (W S GS ) is public dom ain , is not copyrighted, an d may be used without restriction. W e ask that users credit the m ap authors and the W S GS as a courtesy when using this information in whole or in part. This applies to published and un published materials in prin ted or electronic form .Contact the W S GS if you have an y questions about citin g m aterials or preparing ackn owledgem ents.Y ou r cooperation is appreciated.

SCALE 1:24,000 Miles 1 0.5 0 1 Feet 1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 Kilometers 1 0.5 0 1

CONTOUR INTERVAL 20 FEET

NATIONAL GEODETIC VERTICAL DATUM OF 1929 (W

inte r Fa_t Res

ervo_ir) (Halfway Hollow West) _(Halfwa

y Holl ow East) (H ay sta ck B utte s N ort h) (Ha ysta ck B utte_s Sou_th) (Linwood Canyon) (Antel ope Wash ) (B la ck S pr in g R es er vo ir)

GENERALIZED STRATIGRAPHIC SECTION IN THE TWIN BUTTES AND BLACK MOUNTAIN AREA

OPEN FILE REPORT 07-7E

Devils Playground 1:24,000-scale Geologic Map

TbCu TbCm TbCl TbBu TbBm TbBl TbA TBi TbE TbDu TbDm TbDl

Geology - Interpreting the past to provide for the future

WYOMING STATE GEOLOGICAL SURVEY

Ronald C. Surdam, State Geologist

Laramie, Wyoming

EX PLANAT ION

BRIDGER FORMATION PROJECT LOCATION MAP Lone tree Burnt fork McKin non Horse Ran ch Antel ope W ash Reed Rese rvoir Linwo od C anyo n Devils Play groun d Soap Holes Reserv oir Black Sprin g Res ervoir 109°40'W 109°40'W 109°45'W 109°45'W 110°15'W 110°15'W 109°50'W 109°50'W 110°10'W 110°10'W 109°55'W 109°55'W 110°5'W 110°5'W 110°W 110°W 41°10'N 41°10'N 41°5'N 41°5'N 41°N 41°N

INDEX MAP OF 1:24,000 - SCALE QUADRANGLES

Num ber in dica tes W yom in g S tate Geologica l S urvey Open File R eport (OFR ) (1:24,000-sca le digital geologic m a ps a re in cluded on CD for R I-57) A 1:100,000 - sca le geologic m a p of a ll qua dran gles a bove is published in W yom in g S tate Geologica l S urvey R eport of Investiga tions (RI) 57

OFR 0 7-7A OFR 0 7-7B OFR 0 7-7F OFR 0 7-7G OFR 0 7-7C OFR 0 7-7H OFR 0 7-7D OFR 0 7-7E OFR 0 7-7I OFR 0 7-7J

UTM GRID CONVERGENCE (GN)

1999 MAGNETIC DECLINATION (MN) AT CENTER OF SHEET DIAGRAM IS APPROXIMATE MN GN

^

15 MILS0 231 MILS O 52' 13

O A digital version of this map is also available on CD-ROM.

People with disabilities who require an alternative form of communication in order to use this publication should contact the Editor, Wyoming State Geological Survey. TTY Relay Operator 1 (800) 877-9975f

Digital cartography by Justin E. Scott and David W. Lucke

Wyoming State Geological Survey P.O. Box 1347 - Laramie, WY 82073-1347 Phone: (307) 766-2286 - Fax: (307) 766-2605 Email: wsgs_sales@uwyo.edu R 109 W R108 W T 15 N T 14 N T 14 N T 13 N R 108 W R 109 W T 13 N T 14 N T 14 N T 15 N

BEDR OCK

GEOLOGIC

MAP

OF

DEVILS

PLAY GR OU ND

QU ADR ANGLE,

S W EET W AT ER

COU NT Y ,

W Y OMING

by

P.

C.

Murphey,

L.

R .

Bran d,

J.

E.

Ha essig

a n d

A.

A.

S m ith

2007

Base Map from U.S. Geological Survey 1:24,000-scale

topographic map of the Devils Playground, Wyoming 7 1/2-minute Quadrangle, 1983

Projection: Universal Transverse Mercator (UTM), zone 12 North American Datum of 1927 (NAD 27)

1,000 meter grid ticks: UTM zone 12

10,000-foot grid ticks:Wyoming State Plane Coordinate System, West zone

MAP SYMBOLS

Ma rker un it,exposed; see ABBR EVIAT IONS FOR MAR K ER U NITS

Ma rker un it,in ferred where poorly exposed; see ABBR EVIAT IONS

FOR MAR K ER U NITS

Mea sured section; dotted lin e in dica tes brea k or offset in section;'

see K EY T O MEAS U R ED S ECT IONS

S trike a n d dip of beds

µ

1 b

HFT SHLS