Bedrock geologic map of the Horse Ranch quadrangle, Sweetwater County, southwestern Wyoming

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TbCm TbCu TBi TbDm TbE TbCl TbDl TbDu TbCl TbE TBi TBi TBi TbBu unmapped TbBu TbCu TbBu TbBu TbCm TbCm TbBu TbCl TbCm TbCu TbCl TbCm TbDl TbDm TbDu TbE TBi TbDl TbDm TbDu TbE TbDl TbDm TbDu TbE TbDu TbDl TbCu TbCm TbDl TbDm TbCu TbCu TbCu TbCl j l k j k HRRB SCLS SCLS SHLS SHLS HF_T HFT BBS LTLS ULS BBI SCLS SH LS LTLS HFT BELS SHLS BBS ULS BELS BBI BBI ULS BBS LTLS HFT LTL_S BB_S ULS BELS BELS ULS BBI BBI BBI BBI BBI BELS BBI BBS BELS ULS BBS LTLS HFT TbCm TbCl TbDm TbDl TbDu TbDm TBi TbE TbE TbCm TbCl

GEOLOGIC MAP UNITS

DISCLAIMERS

U sers of these ma ps a re ca ution ed a b out using the da ta at sca les differen t tha n those at which the m a ps were co m piled — using this da ta a ta la rgersca le will no tpro vide greater a ccuracy,an d in fa ct,itis a m isuse of the da ta.

T he Wyom in g Sta te Geolo gica l Survey (WSGS) and the Sta te of Wyo m ing ma kes no represen ta tion or wa rranty, expressed or im plied, rega rdin g the use, accura cy, or com pleten ess of the da ta presen ted herein , or from a map printed fro m these da ta ; no r sha ll the act of distrib ution con stitute an y such wa rran ty. The WSGS does no t guaran tee these digita l da ta herein ,o rm a p prin ted fro m these da ta ,to be free o f erro rs o r ina ccuracies.

T he WSGS an d the State of Wyo m ing discla im s any respon sibility or liab ility fo r interpreta tion s fro m this digita l da ta o rm ap prin ted from these digital da ta ,or decisions b ased thereon . The WSGS and the Sta te of Wyo m in g reta in s an d do es no t wa ive sovereign im m un ity.

T he use of or reference to tradem a rks,tra de na m es, or o therpro ductor co m p a n y na m es in this product is for descriptive or informa tio na l purposes, or is pursua nt to licensing a greem ents between the WSGS or the Sta te of Wyo m in g an d softwa re or ha rdwa re developers/ven dors,a n d does no tim ply en dorsem ento f those pro ducts by the WSG S o r the Sta te o f Wyo m in g.

KEY TO MEASURED SECTIONS

(b lue indicates section s sho wn o n this m a p)

Map reference Name of measured section Reference sources *

a Referen ce Sectio n,T win Buttes Mem b er Appen dix 2,T a b le 18

(NortheastSage Creek Mo un ta in )

b SouthwestSage Creek Moun ta in Appen dix 5,T a b le 20

c SouthwestCeda r Moun ta in Appen dix 3,T a b le 19

d T ype Section ,T urtle Bluff Mem b er Appen dix 4,T a b le 19

(West Ceda r Moun ta in)

e SoutheastCeda rMo un tain Appen dix 6,T a b le 21

f T ype Section ,T win Buttes Mem ber Appen dix 1,T a b le 17

(SoutheastT win Buttes)

g NortheastHickey Mounta in T ab le 22

h NortheastSage Creek Mo un tain T ab le 23

i South Ceda rMounta in T ab le 25

j North Ceda rMounta in T ab le 24

k NortheastCeda rMo un tain T ab le 27 l NortheastMa ss Mo unta in T ab le 26

m NorthwestBla ck Mo un tain T ab le 29

n NorthwestT win Buttes T ab le 28

* Referto Wyo m ing Sta te Geo logica l Survey Reporto f Investiga tio n s

57 (2007).

ABBREVIATIONS FOR MARKER UNITS (red in dica tes un its sho wn o n this m a p)

BBI Base o f Bishop Con glo m era te

BRGB Behun in Reservoirgypsum bed

BELS Basal E lim esto n e ULS U pperw hite lim esto ne BBS Basal b lue sheetsan dsto ne

~BBS Appro xim a te level o f Basal b lue

sheetsandsto n e

HRL Hickey Reservo ir lim esto n e LTLS L o netree lim eston e

HFLS Hen rys Fork lim esto ne HFT Hen rys Fork tuff

BFLS BurntFork lim esto ne HRRB Horse Ranch red b ed

HMLS Hickey Mo un ta in lim esto n e SHLS Soa p Holes lim esto ne

BKLS Butcher Knife lim eston e

WRLS Whiskey Reservo ir lim esto ne

SCLS Sage Creek lim esto ne

BISHOP CONGLOMERATE (Oligo cen e)

BRIDGER FORMATION (ea rly a nd m iddle Eocene) Turtle Bluff Member (BridgerE) (middle Eocene) Twin Buttes Member (“U pper Bridger”

o rBridgerC a n d D) (m iddle Eocene) upper Bridger D m iddle BridgerD lower Bridger D upperBridger C m iddle BridgerC lowerBridger C

Blacks Fork Member (“L o wer Bridger” or BridgerA a n d B)(early a n d m iddle Eocen e)

upper Bridger B m iddle BridgerB* lower Bridger B* BridgerA*

* no tpresento n this m a p

NOTICE TO USERS OF W YOMING STATE GEOLOGI CAL SURVEY INFORMATION

Mostin fo rm a tion pro duced by the Wyom in g State Geolo gica l Survey (WSGS) is pub lic do m a in ,is no tcopyrighted,a n d m a y be used withoutrestrictio n.We a sk thatusers credit

the m a p a utho rs a n d the WSGS a s a co urtesy when using this in fo rm a tion in whole o rin part. T his a pplies to published a nd un published m a teria ls in prin ted o relectron ic fo rm .

Con ta ctthe WSGS if you ha ve a n y questio n s a bo utciting m a teria ls or preparing a ckn o wledgem ents. Y o urco opera tio n is a pprecia ted.

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 (Bu tche r Kn_ife Dra_w) (Needle Reservoir) (Wint er Fa t Rese rvoir) (B lac k S prin g R es erv oir ) (An_telo pe W ash₎ (McKinnon) (Burnt fork) (S oa p H ol es R es er vo ir)

OPEN FILE REPORT 07-7C

Horse Ranch 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 PL ANAT ION

Base Map from US Geologic Survey 1:24,000-scale topographic map of the Horse Ranch, Wyoming 7 1/2-minute Quadrangle, 1964

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 _{UTM GRID CONVERGENCE (GN)}

1980 MAGNETIC DECLINATION (MN) AT CENTER OF SHEET DIAGRAM IS APPROXIMATE

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0o 42' 141/2 o 12 MILS 258 MILS

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

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 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

BRIDGER FORMATION PROJECT LOCATION MAP

BEDROCK

GEOL OGIC

MAP

OF

T HE

HORSE

RANCH

QU ADRANGL E,

SWEET WAT ER

COU NT Y ,

SOU T HWEST ERN

WY OMING

b y

P.

C.

Murphey,

J.

E.

Ha essig,

a n d

L .

R.

Bran d

2007

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 b er in dica tes Wyo m in g State Geo lo gica l Survey Open File Report(OFR)

(1:24,000-sca le digita l geo lo gic m a ps a re in cluded o n CD fo r RI-57) A 1:100,000 - sca le geo lo gic m a p o f a ll qua dran gles a b o ve is pub lished in Wyo m in g State Geo lo gica l Survey Report o f Investiga tion s (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 MAP SYMBOLS

Ma rker un it,exposed; see ABBREV IAT IONS FOR MARKER U NITS Ma rker un it,in ferred where poo rly exposed; see ABBREV IAT IONS

FOR MARKER U NITS

Mea sured section ; do tted lin ed in dica tes b rea k o r o ffset; see KEY T O MEASU RED SECT IONS

L o ca tion o f T ype L o ca lity fo r m a rker un its listed b elo w b

HFT SHLS

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BBI

GENERALIZED STRATIGRAPHIC SECTION IN THE AREA OF HICKEY, SAGE CREEK, AND CEDAR MOUNTAINS