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  • ª ª * ¸ ** · Dubiel, R.F., 2003, Geology, depositional models, and oil and gas assessment of the Green River total petroleum system, Uinta-Piceance Province, eastern Utah and
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The map may be incomplete, and inconsistencies, errors, and omissions have not been resolved. While the document is in the review process, it may not conform to UGS standards; therefore it may be premature for an individual or group to take actions based on its contents. Although this product represents the work of professional scientists, the Utah Department of Natural Resources, Utah Geological Survey, makes no warranty, expressed or implied, regarding its suitability for a particular use. The Utah Department of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct, indirect, special, incidental, or consequential damages with respect to claims by users of this product. For use at 1:100,000 scale only. The UGS does not guarantee accuracy or completeness of the data. This geologic map was funded by the Utah Geological Survey and the U.S. Geological Survey, National Cooperative Geologic Mapping Program, through USGS STATEMAP award numbers 06HQAG0037, 07HQAG0141, and 08HQAG0096. The views and conclusions contained in this document are those of the author and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government. INTERIM GEOLOGIC MAP OF THE SEEP RIDGE 30' X 60' QUADRANGLE, UINTAH, DUCHESNE, AND CARBON COUNTIES, UTAH, AND RIO BLANCO AND GARFIELD COUNTIES, COLORADO by Douglas A. Sprinkel 2009 Base from U.S. Geological Survey Seep Ridge Quadrangle, 1981 Projection: UTM, Zone 12 Units: Meters Datum: NAD 1927 Project Manager: Jon K. King GIS and Digital Cartography: J. Buck Ehler Douglas A. Sprinkel Jarom Hlebasko Basia Matyjasik This map is a plot of Geographic Information System (GIS) files created to visually represent the content of the GIS data files. It contains many features that do not meet UGS cartographic standards, such as automatically generated labels that may overlap other labels and lines. ? Utah Geological Survey a division of Utah Department of Natural Resources Plate 1 Utah Geological Survey Open-File Report 549DM Interim Geologic Map of the Seep Ridge 30' x 60' Quadrangle 0 5 10 2.5 MILE 0 10000 20000 30000 40000 50000 60000 FEET 0 2 4 6 8 10 12 14 16 1 KILOMETER 1:100,000 SCALE CONTOUR INTERVAL 50 METERS Utah Geological Survey 1594 West North Temple, Suite 3110 P.O. Box 146100, Salt Lake City, UT 84114-6100 (801) 537-3300 geology.utah.gov

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Page 1: ª ª * ¸ ** · Dubiel, R.F., 2003, Geology, depositional models, and oil and gas assessment of the Green River total petroleum system, Uinta-Piceance Province, eastern Utah and

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This open-file report makes information available to the public during the review and production period necessary for aformal UGS publication. The map may be incomplete, and inconsistencies, errors, and omissions have not beenresolved. While the document is in the review process, it may not conform to UGS standards; therefore it may bepremature for an individual or group to take actions based on its contents.Although this product represents the work of professional scientists, the Utah Department of Natural Resources, UtahGeological Survey, makes no warranty, expressed or implied, regarding its suitability for a particular use. The UtahDepartment of Natural Resources, Utah Geological Survey, shall not be liable under any circumstances for any direct,indirect, special, incidental, or consequential damages with respect to claims by users of this product.For use at 1:100,000 scale only. The UGS does not guarantee accuracy or completeness of the data.This geologic map was funded by the Utah Geological Survey and the U.S. Geological Survey, National CooperativeGeologic Mapping Program, through USGS STATEMAP award numbers 06HQAG0037, 07HQAG0141, and08HQAG0096. The views and conclusions contained in this document are those of the author and should not beinterpreted as necessarily representing the official policies, either expressed or implied, of the U.S. Government.

INTERIM GEOLOGIC MAP OF THE SEEP RIDGE 30' X 60' QUADRANGLE, UINTAH,DUCHESNE, AND CARBON COUNTIES, UTAH, AND RIO BLANCO AND GARFIELD

COUNTIES, COLORADOby

Douglas A. Sprinkel2009

Base from U.S. Geological Survey Seep Ridge Quadrangle, 1981Projection: UTM, Zone 12

Units: MetersDatum: NAD 1927

Project Manager: Jon K. KingGIS and Digital Cartography: J. Buck Ehler

Douglas A. SprinkelJarom HlebaskoBasia Matyjasik

This map is a plot of Geographic Information System (GIS) files created to visually represent the contentof the GIS data files. It contains many features that do not meet UGS cartographic standards, such as

automatically generated labels that may overlap other labels and lines.

?

Utah Geological Surveya division ofUtah Department of Natural Resources

Plate 1Utah Geological Survey Open-File Report 549DM

Interim Geologic Map of the Seep Ridge 30' x 60' Quadrangle

0 5 102.5MILE

0 10000 20000 30000 40000 50000 60000FEET

0 2 4 6 8 10 12 14 161KILOMETER

1:100,000SCALE

CONTOUR INTERVAL 50 METERS

Utah Geological Survey1594 West North Temple, Suite 3110

P.O. Box 146100, Salt Lake City, UT 84114-6100(801) 537-3300

geology.utah.gov

Page 2: ª ª * ¸ ** · Dubiel, R.F., 2003, Geology, depositional models, and oil and gas assessment of the Green River total petroleum system, Uinta-Piceance Province, eastern Utah and

References Cited and Used for Regional GeologyBaars, D.L., 1972, Devonian System, in Mallory, W.W., editor-in-chief, Geologic atlas of the Rocky Mountain region: Rocky Mountain Association of Geologists, p. 90-99.Boden, T., and Tripp, B.T., 2008, Gilsonite resources of the Uinta Basin, Utah, in Longman, M.W., and Morgan, C.D., editors, Hydrocarbon systems and production in the

Uinta Basin, Utah: Rocky Mountain Association of Geologists and Utah Geological Association Publication 37, p. 367-390.Cashion, W.B., 1973, Geologic and structure map of the Grand Junction quadrangle, Colorado and Utah: U.S. Geological Survey Miscellaneous Investigations Series Map

I-736, scale 1:250,000.Cobban, W.A., and Kennedy, W.J., 1989, The ammonite Metengonoceras Hyatt, 1903, from the Mowry Shale (Cretaceous) of Montana and Wyoming: U.S. Geological Survey

Bulletin 1787-L, 11 p.Doelling, H.H., 2001, Geologic map of the Moab and eastern part of the San Rafael Desert 30' x 60' quadrangles, Grand and Emery Counties, Utah, and Mesa County,

Colorado: Utah Geological Survey Map 180, 3 plates, scale 1:100,000.Doelling, H.H., and Graham, R.I., 1972, Eastern and northern coal fields: Utah Geological and Mineral Survey Monograph 2, 411 p.Dubiel, R.F., 2003, Geology, depositional models, and oil and gas assessment of the Green River total petroleum system, Uinta-Piceance Province, eastern Utah and western

Colorado: U.S. Geological Survey Digital Data Series DDS-69-B, compact disc, chapter 5, p. 1-41.Gualtieri, J.L, 1988, Geologic map of the Westwater 30' x 60' quadrangle, Grand and Uintah Counties, Utah, and Garfield and Mesa Counties, Colorado: U.S. Geological

Survey Miscellaneous Investigations Series Map I-1765, scale 1:100,000.Hamblin, A.H., Bilbey, S.A., and Hall, J.E., 2000, Prehistoric animal tracks at Red Fleet State Park, northeastern Utah, in Sprinkel, D.A., Chidsey, T.C., Jr., and Anderson,

P.B., editors, Geology of Utah’s parks and monuments: Utah Geological Association Publication 28, p. 569-578.Hansen, W.R., 1986, Neogene tectonics and geomorphology of the eastern Uinta Mountains in Utah, Colorado, and Wyoming: U.S. Geological Survey Professional Paper

1356, 78 p.Jensen, P.H., and Kowallis, B.J., 2005, Piecing together the Triassic/Jurassic stratigraphy along the south flank of the Uinta Mountains, northeast Utah-a preliminary analysis,

in Dehler, C.M., Pederson, J.L., Sprinkel, D.A., and Kowallis, B.J., editors, Uinta Mountain geology: Utah Geological Association Publication 33, p. 99-109.Johnson, R.C., 1984, New names for units in the lower part of the Green River Formation, Piceance Creek basin, Colorado, in Contributions to stratigraphy: U.S. Geological

Survey Bulletin, 1529-I, p. I1-I20.Johnson, R.C., and Johnson, S.Y., 1991, Stratigraphic and time-stratigraphic cross sections of Phanerozoic rocks along line B-B’, Uinta and Piceance Basin area, west-central

Uinta Basin, Utah to eastern Piceance Basin, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-2184-B, 2 plates, scale 1:500,000.Johnson, R.C., and Roberts, L.N.R., 2003, Depths to selected stratigraphic horizons in oil and gas wells for Upper Cretaceous and lower Tertiary strata of the Uinta Basin,

Utah: U.S. Geological Survey Digital Data Series DDS-69-B, compact disc, chapter 13 p. 1-30.Kay, J.L., 1934, The Tertiary formations of the Uinta Basin, Utah: Carnegie Museum Annals, v. 23, p. 357-371.Lochman-Balk, C., 1972, Cambrian System, in Mallory, W.W., editor-in-chief, Geologic atlas of the Rocky Mountain region: Rocky Mountain Association of Geologists, p.

60-75.Lockley, M.G., Conrad, K., Paquette, M., and Hamblin, A.H., 1992, Late Triassic vertebrate tracks in the Dinosaur National Monument area, in Wilson, J.R., editor, Field guide

to geologic excursions in Utah and adjacent areas of Nevada, Idaho, and Wyoming: Utah Geological Survey Miscellaneous Publication 92-3, p. 383-391.Mallory, W.W., 1958, Pennsylvanian coarse arkosic redbeds and associated mountains in Colorado, in Curtis, B., editor, Symposium on Pennsylvanian rocks of Colorado

and adjacent areas: Rocky Mountain Association of Geologists guidebook, p. 17-20.Molenaar, C.M., and Cobban, W.A., 1991, Middle Cretaceous stratigraphy on the south and east sides of the Uinta Basin, northeastern Utah and northwestern Colorado:

U.S. Geological Survey Bulletin 1787-P, 34 p, 1 plate.Obradovich, J.D., and Cobban, W.A., 1975, A time-scale for the Late Cretaceous of the Western Interior of North America, in Caldwell, W.G.E., editor, The Cretaceous

System of the Western Interior of North America: Geological Association of Canada Special Paper 13, p. 31-54.Osborn, G.D., 1929, The titanotheres of ancient Wyoming, Dakota, and Nebraska: U.S. Geological Survey Monograph 55, v. 1, 701 p.Peterson, O.A., and Kay, J.L., 1931, The upper Uinta Formation of northeastern Utah: Carnegie Museum Annals, v. 20, no. 3-4, p. 293-306.Pipiringos, G.N., and O'Sullivan, R.B., 1978, Principal unconformities in Triassic and Jurassic rocks, Western Interior United States-a preliminary survey: U.S. Geological

Survey Professional Paper 1035-A, 29 p.Poole, F.G., and Stewart, J.H., 1964, Chinle Formation and Glen Canyon Sandstone in northeastern Utah and northwestern Colorado: U.S. Geological Survey

Professional Paper 501-D, P. D30-D39.Riggs, E.S., 1912, New or little known titanotheres from the lower Uinta formation: Field Museum of Natural History Publication 159, Geological Series, v. IV, no. 2,

p.17-41.Scott, R.B., Harding, A.E., Hood, W.C., Cole, R.D., Liviccari, R.F., Johnson, J.B., Shroba, R.R., and Dickerson, R.P., 2001, Geologic map of Colorado National Monument

and adjacent areas, Mesa County, Colorado: U.S. Geological Survey Geologic Investigations Series I-2740, 40 p., 1 plate, scale 1:24,000.Sprinkel, D.A., 2007, Interim geologic map of the Vernal 30' x 60' quadrangle, Uintah and Duchesne Counties, Utah, and Moffat and Rio Blanco Counties, Colorado: Utah

Geological Survey Open-File Report 506DM, GIS data, CD-ROM, scale 1:100,000.Stone, D.S., 1977, Tectonic history of the Uncompaghre uplift, in Veal, H.K., editor, Exploration frontiers of the central and southern Rockies: Rocky Mountain Association

of Geologists guidebook, p. 23-30.Walton, P.T., 1944, Geology of the Cretaceous of the Uinta Basin, Utah: Geological Society of America Bulletin, v. 55, p. 91-130.Weiss, M.P., Witkind, I.J., and Cashion, W.B., 1990, Geologic map of the Price 30' x 60' quadrangle, Carbon, Duchesne, Uintah, Utah, and Wasatch Counties, Utah: U.S.

Geological Survey Miscellaneous Investigations Series Map I-1981, scale 1:100,000.Whitley, J.W., 1981, Surficial geologic map of the Grand Junction 1º x 2º quadrangle, Colorado and Utah: U.S. Geological Survey Miscellaneous Investigations Series Map

I-1289, scale 1:250,000.Wilcox, W.T., and Currie, B.S., 2006, Depositional age and sequence stratigraphy of the Jurassic Curtis, Summerville, and Stump Formations, Utah and Colorado [abs.]:

Geological Society of America Abstracts with Programs, v. 38, no. 7, p. 388.Wright, J.C., Shawe, D.R., and Lohman, S.W., 1962, Definition of members of Jurassic Entrada Sandstone in east-central Utah and west-central Colorado: American

Association of Petroleum Geologists Bulletin, v. 46, no. 11, p. 2057-2070.

32003300

34003500

36003700

38003900

40004100

42004300

440014600

SP LL Cond

Great Basin Petroleum CompanyWest Ashley G-21SW¼NE¼ Sec. 21, T. 5 S., R. 22 E.Uintah County, UtahAPI: 4304730329

95009600

97009800

990010000

1010010200

1030010400

10500

7 8

SP Rn Rln

Phillips Petroleum CompanyJohnson-Watson Fee 2NW¼NW¼ Sec. 34, T. 9 S., R. 25 E.Uintah County, UtahAPI: 4304710916well X06 on plates 1 and 3

1310013200

1330013400

1350013600

1370013800

1390014000

1410014200

1430014400

1450014600

6

SP LL Cond

Gulf Oil CorporationGray Knoll Federal 1SW¼NE¼ Sec. 22, T. 12 S., R. 21 E.Uintah County, UtahAPI: 4304730226well AA08 on plates 1 and 3

1270012800

1290013000

1310013200

1330013400

1350013600

1370013800

13900

5

SP SFL Cond

IP Petroleum Co.Agency Draw 16-3SE¼SE¼ Sec. 3, T. 13 S., R. 20 E.Uintah County, UtahAPI: 4304731510well AA09 on plates 1 and 3

1130011400

1150011600

1170011800

1190012000

4

GR LL Cond

Wind River Resources CorporationNorth Hill Creek 10-10-15-20NW¼SE¼ Sec. 10. T., 15 S., R. 20 E.Uintah County, UtahAPI: 4304734830well AA13 on plates 1 and 3

91009200

93009400

95009600

97009800

990010000

3

SP Ri Rn Cond

Beartooth Oil & Gas CompanyFence Canyon Unit 1NE¼SE¼ Sec. 36, T. 15 S., R. 22 E.Uintah County, UtahAPI: 4304716197

49005000

51005200

53005400

55005600

57005800

5900

2

SP Ri Rn Cond

JC Thompson OperatorWestwater Unit E5NE¼NW¼ Sec. 18, T. 17 S., R. 24 EGrand County, UtahAPI: 4301930077

SP SHIFT

14001500

16001700

18001900

20002100

22002300

24002500

2500

1

SP Ri LL Cond

Tiger Oil CompanyState 12-11SW¼NW¼ Sec. 11, T. 24 S., R. 20 E.Grand County, UtahAPI: 4301930455

Formation Depth ThicknessEntrada Sandstone 1401 239Carmel Formation 1640 110Navajo Sandstone 1750 240Kayenta Formation 1990 146Wingate Formation 2136 394Chinle Formation 2530Glen Canyon Group 1750 780

Formation Depth ThicknessEntrada Sandstone 5028 148Carmel Formation 5176 116Navajo Sandstone 5292 69Kayenta Formation 5361 191Wingate Formation 5552 272Chinle Formation 5824Glen Canyon Group 5292 532

Formation Depth ThicknessEntrada Sandstone 9194 166Carmel Formation 9360 46Navajo Sandstone 9406 159Kayenta Formation 9565 175Wingate Formation 9740 216Chinle Formation 9956Glen Canyon Group 9406 550

Formation Depth ThicknessEntrada Sandstone 11288 269Carmel Formation 11557 53Navajo Sandstone 11610 35Kayenta Formation 11645 99Wingate Formation 11744 268Chinle Formation 12012Glen Canyon Group 11610 402

Formation Depth ThicknessEntrada Sandstone 12755 305Carmel Formation 13060 48Navajo Sandstone 13108 113Kayenta Formation 13221 74Wingate Formation 13295 363Chinle Formation 13658Glen Canyon Group 13108 550

Formation Depth ThicknessEntrada Sandstone 13299 226Carmel Formation 13525 112Navajo Sandstone 13637 150Kayenta Formation 13787 25Wingate Sandstone 13812 477Chinle Formation 14289Glen Canyon Group 13637 652

Formation Depth ThicknessEntrada Sandstone 9530 222Carmel Formation 9752 60Nugget Sandstone 9812 598Chinle Formation 10410

Formation Depth ThicknessEntrada Sandstone 3289 168Carmel Formation 3457 121Nugget Sandstone 3578 702Chinle Formation 4280

Wingate Sandstone

Chinle Formation

Kayenta Formation

Carmel Formation

Navajo Sandstone

Entrada Sandstone

Chinle Formation

Carmel Formation

Nugget Sandstone

Entrada Sandstone

LOG CURVE ABBREVIATIONSSP - Spontaneous PotentialRn - Resistivity NormalRln - Resistivity Long NormalRl - Resistivity LateralRi - Resistivity InductionLL - Resistivity LaterologSFL - Spherically Focused LogGR - Gamma RayCond - Conductivity

All depths and thicknesses reported in feet

J-3 unconformity J-3 unconformity

46 miles 10 miles 15 miles 13 miles 7 miles 29 miles 32 miles

ancestral Uncompahgre uplift

J-1 unconformity

J-1 unconformity

This cross section shows the correlation of Lower and Middle Jurassic formations from near Moab, Utah, northward to near Vernal, Utah. It was drawn to highlight the change in nomenclature between Glen Canyon Group and the Nugget Sandstone based on regional changes of the petrophysical log signatures, supported by limited sample descriptions and cuttings. The Glen Canyon Group includes the Wingate Sandstone, Kayenta Formation, and Navajo Sandstone, in ascending order. The Wingate and Navajo are sandstone beds of predominantly eolian origin whereas the Kayenta is sandstone, siltstone, and minor limestone beds of fluvial-lacustrine origin. The Nugget Sandstone is predominantly of eolian origin. The cross section shows the Glen Canyon-Nugget interval thins over the ancestral Uncompahgre uplift, mostly at the expense of the Navajo Sandstone. In addition, Kayenta also thins northward and eventually pinches out. The nomenclatural change between Glen Canyon Group and Nugget Sandstone is where the Kayenta Formation is no longer identified in wells. The Kayenta Formation is characterized as having a more positive SP response and higher resistivity as compared to the overlying Navajo and underlying Wingate. The cross section datum is the J-3 unconformity at the top of the Entrada Sandstone.

'

ª

ª

'

ª

ª

ª

'

"

"

"

"

"

"

"

"

"

"

"

"

" 4

5

8

6

3

7

1

2

Moab

Price

Kamas

Vernal

Manila

Tabiona

Duchesne

Coalville

Heber City

Green River

Castle Dale

UTAHWYOMING

COLO

RADO

Seep Ridge30' x 60' quadrangle

0 4020 MilesNugget-Glen Canyon Gp. outcrop

ª Plugged and Abandoned

' Producing

Uncompahgre fault zone

Garmesa fault zone

Flat Rock fault

Seep Ridge fault zone

Douglas Creek fault zone

DU

D

DU

U

DU

Uncompahgre

Sand Wash fault

ancestral

uplift

N UTAH

Park City and Phosphoria Formations

Weber Sandstone Maroon Formation

Morgan FormationLeadville Limestone

Lodore FormationCambrian carbonate rocks

Devonian rocks

Metamorphic rocks

0-275

0-525

0-140

0-125

0-1800-2750-40

unknown

Pp

PIPw

IPmMlD

YXmC- lC- c

*includes subsurface thickness**see Correlation of Quaternary Units

Cambrian

Devonian

Pennsylvanian

Proterozoic

Permian

Mississippian

PIPma

SYSTEM

Quaternary

Tertiary

Cretaceous

Jurassic

Triassic

Q**Tub

Tua-Tgsl

Tgd

Tgp

Tg-Tw

TwTgf

Kms

Kmv

Kfd

KJcm

Jsc

JTRn

TRc

TRcm

SYMB

OL

JTRg

Unconsolidated depositsMember B of Uinta Formation

Member A of Uinta FormationSandstone-Limestone facies of Green River

FormationParachute Creek Member of

Green River FormationDouglas Creek Member of

Green River Formation

Wasatch Formation

Green River-Wasatch Formations transition zone

Mancos Shale

Mesaverde Group

Flagstaff Member of Green River Formation

Cedar Mountain Formation

Mowry ShaleDakota Sandstone

Frontier Sandstone

Morrison FormationStump Formation

Entrada SandstoneCarmel Formation

Nugget Sandstone

Glen

Can

yon

Grou

p Navajo Sandstone

Kayenta Formation

Wingate Sandstone

Chinle Formation

Moenkopi Formation

FORMATIONS

less than 5030-22560-180

247-950

45-520

60-220

1035-1400

620-805

280-8300-800+

40-9510-4510-3510-110

10-6015-9540-14550-190

0-155

45-176

95-255

Thickness*(meters)(not to scale)

Unconformity; about 6 m.y.; TK boundary and the extinction of dinosaursUplift of Uinta Mountains begins near end of Cretaceous

End of Western Interior Seaway

Contains gilsonite deposits

Mahogany oil shale zone

Mesaverde Group is gas reservoir in Uinta Basin and contains minor coal; most of Mesaverde Group and underlying formations are not exposed in the quadrangle

Gas reservoir in Uinta Basin

Gas reservoir in Uinta BasinFossil fish scales in Mowry

K-1 unconformity; about 2 m.y.

Abundant dinosaur remains

Redwater Member of Stump transitions southward to Summerville Formation; contains belemnite fossilsJ-3 unconformity; about 1 m.y.

J-5 unconformity; about 2 m.y.

Isocrinus fossilsJ-1 unconformity; about 14 m.y

TR-3 unconformity; about 15 m.y.

TR-1 unconformity; about 6 m.y.; no Dinwoody Formation recognizedContains phosphate deposits

Gartra Member

Weber Sandstone is an important oil reservoirUnconformity; about 3 m.y.

K-0 unconformity; about 25 m.y.

Uinta Mountains continue to uplift and erode, locally exposing the Uinta Mountain Group; subsidence of Uinta Basin; gas reservoir in Uinta Basin

Uinta Mountains continue to uplift and erode; creation of Lake Uinta as the Uinta Basin continues to subside; contains oil shale and oil reserves

Horse Bench Sandstone BedTuffaceous bed B

Tuffaceous bed A of Member A of Uinta Formation

Long Point Bed

Unconformity; about 1.2 b.y.

contains marine fossils and karst

Unconformity; about 100 m.y.

NOTESLITHOLOGY

Stratigraphic Column

Correlation of Bedrock Units

Eocene

Paleocene

Upper Cretaceous

Lower Cretaceous

Upper Jurassic

Upper Triassic

Upper Pennsylvanian

Upper Mississippian

Upper Devonian

Upper Cambrian

MesoproterozoicPaleoproterozoic

Lower Mississippian

Middle PennsylvanianLower Pennsylvanian

Middle Jurassic

Lower Jurassic

Lower Triassic

Lower PermianUpper Permian

Tertiary

Cretaceous

Jurassic

Triassic

Permian

Pennsylvanian

Mississippian

Devonian

Cambrian

Proterozoicunconformity

unconformity

unconformity

unconformity

unconformity

unconformity

unconformityunconformity

unconformity

local unconformity

unconformity

unconformity

Cl-Cc-

Ml

D

YXm

IPm

PIPwPIPma PIPmu

Pp

TRcTRcm

JTRn JTRg

KJcm

Kmv

TwTg-Tw

Tgf

Tgsl

Tgp

Kms

Kfd

Jsc

not e

xpos

ed

Tub

Tgd

Tua

?

Correlation of Quaternary UnitsAlluvial Deposits Colluvial

DepositsEolian

DepositsMass-Movement

DepositsMixed

Deposits

?

?

?

?

?

??

? ?

Holoc

ene

Pleist

ocen

eQuate

rnary

?

Age

Qal

Qat

Qc

Qaf

Qa

Qe

?

Qms

Qmt Qmtb Qac Qae?

Description of Map Units STREAM ALLUVIUM (HOLOCENE) - Unconsolidated silt, sand, and gravel in

flood plains of Green and White Rivers, Nine Mile Creek, and other larger perennial creeks; locally grade into Qac; 1-30 m thick.

STREAM TERRACE DEPOSITS (HOLOCENE AND PLEISTOCENE[?]) - Unconsolidated to locally cemented silt, sand, cobbles, and boulders; at least three levels of fluvial terrace remnants along the Green and White Rivers; the youngest deposit is about 10-15 m above modern flood plain, the intermediate-age deposit is about 50 m above modern flood plain, and the oldest deposit is about 130 m above modern flood plain and may be related to deposits mapped as basin alluvium (Qa); each deposit is less than a few tens of meters thick.

BASIN ALLUVIUM (HOLOCENE AND PLEISTOCENE[?]) - Variably consolidated, poorly to moderately sorted silt, sand, gravel, cobbles, and boulders deposited on near-planar bedrock surfaces in northwest corner of map area; poorly to well-developed soil profile preserved in some deposits; less than 2 m thick.

ALLUVIAL-FAN DEPOSITS (HOLOCENE AND PLEISTOCENE[?]) - Unconsolidated, poorly sorted boulders, gravel, sand, and silt; locally grades into Qac; less than 30 m thick.

COLLUVIUM (HOLOCENE) - Heterogeneous mixture of boulders, cobbles, sand, and silt; may grade into talus, landslide, and alluvial deposits; 10 m thick.

EOLIAN DEPOSITS (HOLOCENE) - Unconsolidated, well-sorted, fine-grained, windblown sand and silt along Green River; less than 10 m thick.

SLIDES, SLUMPS, AND FLOWS (HOLOCENE AND PLEISTOCENE) - Landslides, slumps and debris flows; locally may include colluvium and talus deposits; some map areas include mass-movements deposits of slightly different ages that share a common boundary.

TALUS DEPOSITS (HOLOCENE AND PLEISTOCENE[?]) - Unconsolidated and unstratified angular rock fragments at the base of cliffs; includes colluvium locally; less than 5 m thick.

TALUS DEPOSITS OF BAKED ROCK (HOLOCENE) - Reddish fragments of baked rock in talus below burned outcrops of the Mahogany oil-shale zone; includes colluvium locally; mapped in the Weaver Ridge quadrangle; 30 m thick.

MIXED ALLUVIUM AND COLLUVIUM (HOLOCENE AND PLEISTOCENE[?]) - Unconsolidated clay, silt, sand, and gravel in stream drainages and in areas of low topographic relief; less than 10 m thick.

MIXED ALLUVIUM AND EOLIAN DEPOSITS (HOLOCENE) - Unconsolidated alluvium (clay, silt, and sand) mixed with windblown sand and silt located on near planar surfaces; less than 10 m thick.

MEMBER B OF UINTA FORMATION (EOCENE, UINTAN) - Light-gray, light-greenish-gray, light-brown, and light-purple, mudstone and claystone with interbeds of greenish-gray, yellow, and brown fine-grained sandstone; contains minor conglomerate and tuffaceous beds; forms nonresistant slopes and thin resistant ledges; consists mostly of Horizon B of Osborn (1929), Peterson and Kay (1931), and Kay (1934); these beds are included in the informal Wagonhound member of some workers; contains significant gilsonite deposits; 30-225 m thick.

MEMBER A OF UINTA FORMATION (EOCENE, UINTAN) - Yellowish-gray and yellowish-brown, fine- to very fine grained sandstone and siltstone; contains minor conglomerate, shale, and tuffaceous interbeds; forms resistant beds; consists of Horizon A of Osborn (1929), Peterson and Kay (1931), and Kay (1934); these beds are included in the informal Wagonhound member of some workers; contains locally mappable tuff beds (bed A of Cashion [1974] and Keighin [1977c]); intertongues with the underlying Parachute Creek Member of the Green River Formation; the amount of Green River beds increases westward across the quadrangle; intertongues with and in part equivalent to the sandstone and limestone facies of the Green River Formation in the western part of the quadrangle; a gradational contact on the map at Big Pack Mountain represents where the approximate ratio of Tua to Tgsl map units change, although areas mapped as Tua around Big Pack Mountain include strata of the Tgsl and areas around Hill Creek mapped as Tgsl include strata of Tua; the lower contact is irregular and bedding is contorted because of soft-sediment deformation; generally thins northward; 60-140 m thick.

SANDSTONE AND LIMESTONE FACIES OF GREEN RIVER FORMATION (EOCENE, UINTAN) - Alternating beds of light- to medium-brown, fine-grained sandstone with interbedded siltstone and shale and white to light-gray limestone; unit has a banded appearance; intertongues with and in part equivalent to member A of the Uinta Formation; see description of Tua; thickens westward (see Price 30' x 60' quadrangle [Weiss and others, 1990]); 0-180 m thick.

PARACHUTE CREEK MEMBER OF GREEN RIVER FORMATION (EOCENE, UINTAN AND BRIDGERIAN) - Moderately resistant, light- to medium-gray, light- to medium-brown, yellow, organic-rich marlstone, siltstone, sandstone, and oolitic limestone; contains pods of the mineral nahcolite, NaHCO3, some of which have been leached leaving cavities; contains several oil shale beds including the mapped Mahogany oil-shale zone; Horse Bench Sandstone is a mapped regional marker bed in the Parachute Creek Member (see description in Map Symbols section); contains locally mappable tuff beds (see bed B of Cashion [1984]) that are not shown on this map; generally mapped as upper member (Tgu) in adjoining Price 30' x 60' quadrangle by Weiss and others (1990); upper part of Parachute Creek intertongues with overlying Uinta Formation; 247-950 m thick.

DOUGLAS CREEK MEMBER OF GREEN RIVER FORMATION (EOCENE, BRIDGERIAN) - Poorly to moderately resistant, light- to medium-gray, light- to medium-brown, yellow, and light-gray siltstone, sandstone, shale, and cherty and oolitic limestone; includes the distinctive reddish-brown, fine-grained sandstone, yellowish-brown marlstone, and bluish-gray to dark brown oil shale of an intertonguing unit in the Dragon quadrangle (shown in Scott and Pantea, 1985); base of member is mapped on the light-brown ostracodal limestone (0.6 m thick) of Long Point Bed of Johnson (1984); may include upper part of the Green River-Wasatch Formations transition zone in Burnt Timber, Cooper Canyon, Bates Knolls, Agency Draw NE, and Agency Draw NW quadrangles where the Long Point Bed was not shown on source maps; generally mapped as middle member (Tgm) by Weiss and others (1990); thickens southward and northward from Each Bench area; 45-520 m thick.

GREEN RIVER-WASATCH FORMATIONS TRANSITION ZONE (EOCENE, BRIDGERIAN AND WASATCHIAN) - Intertonguing beds of Green River (lithotypes similar to Douglas Creek Member) and Wasatch Formations; includes unnamed tongue and Cow Ridge Member of the Green River Formation and Renegade Tongue and unnamed tongue of the Wasatch Formation; represents interval between the base of Long Point Bed and the main body of the Wasatch Formation; mapped as part of Colton Formation in adjoining Price 30' x 60' quadrangle by Weiss and others (1990); about 60-220 m thick.

WASATCH FORMATION (EOCENE AND PALEOCENE[?], WASATCHIAN AND CLARKFORKIAN) - Red, yellow, and light-gray friable sandstone, siltstone, mudstone, and conglomerate; conglomerate is thin bedded and contains chert (black, brown, and gray) and quartzite pebbles; upper part intertongues with overlying Douglas Creek Member of Green River Formation where the transition zone is not identified; in Davis Canyon quadrangle (Pantea, 1987), base of Wasatch is at lowermost conglomerate bed; the Wasatch Formation in the Seep Ridge 30' x 60' quadrangle is mapped as part of Colton and Wasatch Formations in adjoining Price 30' x 60' quadrangle by Weiss and others (1990); Wasatch Formation may include limestone beds of the Flagstaff Member of Green River Formation (Tgf) in the subsurface of the western part of the quadrangle but pinches out eastward (see Johnson and Johnson, 1991); 280-830 m thick.

FLAGSTAFF MEMBER OF GREEN RIVER FORMATION (EOCENE[?] AND PALEOCENE, CLARKFORKIAN AND TIFFANIAN) - Mostly medium- to dark-gray carbonate, light-gray sandstone, light-gray to green-gray claystone; only identified in subsurface from lithologic and geophysical well logs; intertongues with Wasatch Formation; shown on cross section only; 0-800+ m thick.

MESAVERDE GROUP, UNDIVIDED (UPPER CRETACEOUS, MAASTRICHTIAN AND CAMPANIAN) - Exposed part is moderately resistant, light-gray to pale-grayish-orange, medium- to fine-grained, lenticular cross-bedded sandstone, gray-green shale, and local conglomerate of the Tuscher Formation; subsurface part is light-gray, tan, and light-yellow, cross-bedded sandstone with subordinate gray carbonaceous shale and coal of Farrer and Neslen Formations; likely includes beds of the Sego Sandstone, Buck Tongue of the Mancos Shale, and Castlegate Sandstone (Johnson and Roberts, 2003); exposed thickness 30 m; 620-805 m thick in subsurface.

THE FORMATIONS BELOW ARE NOT EXPOSED IN THIS QUADRANGLE. DESCRIPTIONS ARE FROM SAMPLE LOGS AND CUTTINGS OF WELLS IN THE QUADRANGLE AND FROM EXPOSURES IN THE VERNAL 30' X 60' QUADRANGLE (SPRINKEL, 2007) AND WESTWATER 30' X 60' QUADRANGLE (GUALTIERI, 1988).MANCOS SHALE (UPPER CRETACEOUS, CAMPANIAN TO CONIACIAN) -

Dark-gray, soft, slope-forming calcareous shale containing beds of siltstone and bentonitic clay; 1035-1400 m thick.

FRONTIER SANDSTONE, MOWRY SHALE, AND DAKOTA SANDSTONE, UNDIVIDED - These formations are shown as one unit on the cross section; see below for descriptions and thickness; combined thickness is 30-190 m.

Frontier Sandstone (Upper Cretaceous, Turonian) - Upper part is resistant, light-brown to light-gray and yellow, fine-grained and ripple-marked sandstone with local petrified wood and fossils; lower part is soft, light- to dark-gray calcareous shale; may include minor limestone and coal beds in the lower part; likely mapped as Ferron Sandstone Member of Mancos Shale in adjoining Westwater 30' x 60' quadrangle by Gualtieri (1988); 10-110 m thick.

Mowry Shale (Upper and Lower Cretaceous, Cenomanian and Albian) - Dark-gray, siliceous shale that weathers silver gray; contains abundant fossil fish scales; age based on Obradovich and Cobban (1975), Cobban and Kennedy (1989), Molenaar and Cobban (1991), and unpublished palynological data; likely mapped as lower shale member of Mancos Shale in adjoining Westwater 30' x 60' quadrangle by Gualtieri (1988); 10-35 m thick.

Dakota Sandstone (Lower Cretaceous, Albian) - Upper and lower resistant, yellow and light-gray, medium- to coarse-grained sandstone beds separated by a carbonaceous shale; contains coal beds in exposures in the Vernal 30' x 60' quadrangle (Doelling and Graham, 1972); 10-45 m thick.

CEDAR MOUNTAIN FORMATION AND MORRISON FORMATION - Cedar Mountain is shown with the underlying Morrision Formation in the cross section because these formations are too thin to show separately at cross section scale; the top of the Morrison Formation is identified in petrophysical and sample logs as variegated mudstone beds that underlie a basal conglomeratic sandstone (Burro Canyon Member) of the Cedar Mountain Formation; combined thickness is 90-285 m.

Cedar Mountain Formation (Lower Cretaceous, Albian and Aptian) - Purple, gray, and greenish-gray mudstone, siltstone, minor sandstone, and limestone; includes basal conglomeratic sandstone; contains calcrete beds; 40-95 m thick.

Morrison Formation (Upper Jurassic, Tithonian and Kimmeridgian) - Upper Brushy Basin Member consists of soft, banded, variegated (light-gray, olive-gray, red, and light-purple) shale, claystone, siltstone, and minor cross-bedded sandstone, conglomerate, and bentonite. Lower Salt Wash Member consists of resistant, light-gray to white, cross-bedded sandstone; contains dinosaur remains at Dinosaur National Monument; 50-190 m thick.

STUMP FORMATION, ENTRADA SANDSTONE, AND CARMEL FORMATION, UNDIVIDED - These formations are shown as one unit because they are too thin to show separately at cross section scale; see below for unit description and individual formation thickness; combined thickness is 65-300 m.

Stump Formation (Upper Jurassic, Oxfordian) - Upper Redwater Member is greenish-gray and light-green, slope-forming shale with glauconitic, fossiliferous (belemnites) sandstone and limestone. Lower Curtis Member is resistant, light-gray to greenish-gray, cross-bedded, fossiliferous, glauconitic sandstone and fissile shale; palynomorph assemblage from base of Curtis indicates Oxfordian age (Wilcox and Currie, 2006; Brian Currie, Miami University (Ohio), verbal communication, March 15, 2006); J-3 unconformity of Pipiringos and O’Sullivan (1978) is at base of their Curtis Formation; Redwater Member of Stump correlates to the Summerville Formation, and the Curtis Member correlates to the Moab Member of the Curtis Formation (Doelling, 2001), formerly a member of the Entrada Sandstone (Wright and others, 1962); 40-145 m thick.

Entrada Sandstone (Middle Jurassic, Callovian) - Upper reddish-brown siltstone and fine-grained sandstone and a lower light-gray, pink, and light-brown sandstone; lower sandstone is resistant to erosion and forms cliffs and ridges; 15-95 m thick.

Carmel Formation (Middle Jurassic, Callovian to Bajocian) - Medium- to dark-red, green, and gray sandy shale, sandstone, siltstone, limestone, and gypsum; upper part is mostly slope-forming red shale, siltstone, and sandstone underlain by a middle gypsiferous unit; lower part is mostly red siltstone and thin, ledge-forming limestone, which is commonly oolitic and fossiliferous; 10-60 m thick.

NUGGET SANDSTONE (LOWER JURASSIC AND UPPER TRIASSIC, TOARCIAN TO RHAETIAN) - Pink, light-gray, and light-brown, resistant, massive-weathering, large-scale cross-bedded sandstone; locally contains carbonate lenses (playa) and fluvial lenses (wadi) near top; forms cliffs and ridges; called Glen Canyon Sandstone by Poole and Stewart (1964), a term that is confusing and is not the same as the Glen Canyon Group; Jurassic-Triassic age is supported by Early Jurassic dinosaur tracks near the top of Nugget Sandstone at Red Fleet Reservoir (Hamblin and others, 2000) and Late Triassic vertebrate tracks in lower 10 m of Nugget Sandstone (Lockley and others, 1992); 180-255 m thick.

NOTE: The transition from Nugget Sandstone to the three formations of the Glen Canyon Group is in the subsurface of this quadrangle. It is based on where the petrophysical log signature, sample log descriptions, and cuttings that characterize the Kayenta Formation are no longer recognized suggesting the Kayenta changes lithofacies northward from the buried ancestral Uncompahgre uplift in the southern part of the quadrangle; both Nugget Sandstone and Glen Canyon Group thin toward and across the ancestral Uncompahgre uplift (see illustration on this plate showing regional correlation).

GLEN CANYON GROUP, NAVAJO SANDSTONE, KAYENTA FORMATION, AND WINGATE SANDSTONE (LOWER JURASSIC AND UPPER TRIASSIC, TOARCIAN TO RHAETIAN) - An upper light-pink, fine-grained sandstone is the Navajo Sandstone; a middle reddish, fine-grained sandstone, siltstone and thin reddished and dark-gray shale is the Kayenta Formation; and a lower light-brown, fine-grained sandstone is the Wingate Sandstone; Navajo Sandstone is 11-62 m thick; Kayenta Formation is 8-35 m thick; Wingate is 76-130 m thick; total group thickess is 95-227 m.

CHINLE AND MOENKOPI FORMATIONS, UNDIVIDED - Combined where formations are too thin to show separately at cross section scale; see below for descriptions and thickness; combined thickness is 45-331m.

CHINLE FORMATION (UPPER TRIASSIC, RHAETIAN TO CARNIAN) - Purplish-red, purple, light-gray, greenish-gray, light-green, ripple-marked siltstone, sandstone, claystone, shale, and conglomerate that locally contains abundant petrified wood; generally forms slopes; upper 26-36 m is light-reddish-brown planar laminated sandstone, cross-bedded sandstone, siltstone, and variegated mudstone; base is resistant conglomerate unit named the Gartra Member; 45-176 m thick.

MOENKOPI FORMATION (LOWER TRIASSIC, OLENEKIAN TO INDUAN) - Medium- to dark-red, reddish-brown, green, and gray, ripple-marked siltstone, fine-grained sandstone, and shale with gypsum and limestone beds; mostly “soft,” slope-forming unit; pinches out over ancestral Uncompahgre uplift; 0-155 m thick.

PARK CITY AND PHOSPHORIA FORMATIONS (LOWER PERMIAN, LEONARDIAN) - Combined thickness of Park City and Phosphoria Formations is 0-125 m; pinches out to east and south.

Franson Member of Park City Formation - Gray, thick- to thin-bedded cherty limestone and dolomite interbedded with brownish-gray sandstone and red to ochre shale; generally resistant and forms ledges and cliffs.

Meade Peak Phosphatic Shale Member of Phosphoria Formation - Slope-forming, dark-gray phosphatic shale with interbeds of sandstone and limestone.

Grandeur Member of Park City Formation - Light-gray to light-brownish-gray sandstone, dolomite, and limestone; generally resistant and forms ledges and cliffs.

WEBER SANDSTONE (LOWER PERMIAN TO MIDDLE PENNSYLVANIAN, WOLFCAMPIAN TO DESMOINESIAN) - Light-gray to yellowish-gray, very thick bedded sandstone with interbeds of limestone in the lower part; highly cross-bedded sandstone in the upper part; forms steep cliffs and ridges; thins and grades into the Maroon Formation from the northern part of quadrangle to east and south; 0-400 m thick (maximum thickness based on approximate Weber thickness in the adjoining Vernal 30' x 60' quadrangle).

MAROON AND MORGAN FORMATIONS (LOWER PERMIAN TO MIDDLE PENNSYLVANIAN, WOLFCAMPIAN TO DESMOINESAIN) - Maroon Formation (Wolfcampian to Desmoinesian) is shown with the underlying Morgan Formation (Desmoinesian) where these formations are too thin to show separately at cross section scale; both units thin southward in the quadrangle and pinch out on the north flank of the ancestral Uncompahgre uplift; 0-78 m thick.

MAROON FORMATION (LOWER PERMIAN TO MIDDLE PENNSYLVANIAN, WOLFCAMPIAN TO DESMOINESAIN) - Light red to white, fine- to coarse-grained, poorly sorted arkosic sandstone; interbedded with conglomerate; conglomerate clasts composed of white quartz, chert, and gray shale; intertongues with Weber Sandstone in the subsurface in northern part of quadrangle; 0-525 m thick.

MORGAN FORMATION (MIDDLE PENNSYLVANIAN, DESMOINESIAN) - Light- to medium-red, yellow, and gray shale and siltstone, light- to medium-gray fossiliferous and red cherty limestone, and light-red-gray, fine-grained, locally cross-bedded sandstone; 0-140 m thick.

LEADVILLE LIMESTONE (UPPER AND LOWER MISSISSIPPIAN, MERAMECIAN TO KINDERHOOKIAN) - Mostly dark-gray, medium to coarse crystalline, cherty limestone and dolomite; chert is typically light gray; regionally contains numerous caves and sinkholes; unit thins southward in the quadrangle and pinches out on the north flank of the ancestral Uncompahgre uplift; regionally 0-275 m thick.

DEVONIAN ROCKS, UNDIVIDED (UPPER DEVONIAN, FAMENNIAN) - White to light-gray dolomitic limestone, dark-gray argillaceous limestone, brown-gray sandy dolomite and sandstone; may consist of only the Ouray Limestone; 0-40 m thick; not shown on cross section but identified in wells east of cross section.

CAMBRIAN CARBONATE ROCKS, UNDIVIDED (UPPER CAMBRIAN, SUNWAPTAN[?] TO STEPTOEAN[?]) - Dark-gray to blue-gray, finely crystalline dolomite with some green micaceous shale in the lower part of the section; unit thins southward in the quadrangle and pinches out on the north flank of the ancestral Uncompahgre uplift; 0-275 m thick.

LODORE FORMATION (UPPER CAMBRIAN, SUNWAPTAN[?] TO STEPTOEAN[?]) - Light-brown to greenish-gray sandstone underlain by pink to tan to pale-greenish-gray glauconitic shale interbedded with tan to pale-green sandstone; base is variegated (pink, gray, and pale-green), coarse- to medium-grained, cross-bedded sandstone; locally pebbly; unit thins southward in the quadrangle and pinches out on the north flank of the ancestral Uncompahgre uplift; 0-180 m thick.

METAMORPHIC ROCKS (MESOPROTEROZOIC AND PALEOPROTEROZOIC) - Well cuttings include a mix of medium- to dark-gray and pink-gray, coarse-grained metamorphic and meta-igneous rocks; minerals include quartz, biotite, hornblende, orthoclase, and plagioclase; these rocks are likely similar to meta-igneous gneiss and migmatitic meta-sedimentary rocks exposed near Grand Junction, Colorado, and described by Scott and others (2001); cuttings also include dark-gray, fine-grained rocks that may be similar to Mesoproterozoic lamprophyre dikes exposed near Grand Junction, Colorado (see Scott and others 2001); dates on these rocks from near Grand Junction, Colorado, are preliminary discordant U/Pb zircon ages of 1721±14 Ma on meta-igneous rocks, 1741±14 Ma on meta-sedimentary rocks, and 40Ar/39Ar age of 1400 Ma on lamprophyre dike rocks (Scott and others, 2001); maximum thickness unknown.

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Plate 2Utah Geological Survey Open-File Report 549DM

Interim Geologic Map of the Seep Ridge 30' x 60' Quadrangle

UTAH GEOLOGICAL SURVEYa division ofUtah Department of Natural Resources

ACKNOWLEDGMENTS

This report is both a compilation and my new mapping and interpretations. It reflects the current understanding of the geology of the eastern Uinta Basin built upon past generations of geologists. I thank Taylor Boden and Bryce Tripp (Utah Geological Survey) for providing their mapping of gilsonite veins and discussing gilsonite resources in the Uinta Basin; Sonja Heuscher (Utah Geological Survey) for providing mapping of the Mahogany oil-shale zone in the Nine Mile Canyon area; Michael D. Vanden Berg (Utah Geological Survey) for discussing petrophysical log signature of the Mahogany oil-shale zone; and Craig Morgan (Utah Geological Survey) for discussing the regional Green River Formation startigraphy.I thank Jarom Hlebasko and Basia Matyjasik for digitizing the published U.S. Geological Survey quadrangle maps and creating the initial GIS files I used to compile this map. I especially thank J. Buck Ehler for reviewing the GIS files for consistency, creating the final layout of plate 1, and the final layout of the cross section on plate 3.Finally I gratefully thank Jon K. King (Utah Geological Survey) for his thoughtful review of the map and supporting materials and for his insightful discussions on various aspects of the geology of this and surrounding regions. I also thank Rick G. Allis, Grant C. Willis, J. Buck Ehler, Kimm Harty, Sonja Heuscher, Don DeBlieux, Michael D. Hylland, Craig D. Morgan, and Robert Ressetar (Utah Geological Survey) for additional reviews.

Page 3: ª ª * ¸ ** · Dubiel, R.F., 2003, Geology, depositional models, and oil and gas assessment of the Green River total petroleum system, Uinta-Piceance Province, eastern Utah and

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NORTHAMETERS METERS

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Locations of pinchouts and lithofacies changes approximate and based in part on wells in Table 2See Stone (1977) for fault names

Quaternary deposits too thin to show at cross section scale

White River East Bench Seep Ridge Willow Creek Flat Rock Mesa Lower Wagon Canyon

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Seep Ridge fault zone

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AA12AA09, Projected 4.5km SE AA10, Projected 4km NW

0

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109º 22' 30"109º 30' 00"109º 37' 30"109º 45' 00"109º 52' 30"110º 00' 00" 109º 15' 00" 109º 07' 30" 109º 00' 00" W39º 30' 00" N

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US Geological Survey 7.5' topographic quadrangles names and geologic mapscompiled in the Seep Ridge 30' x 60' quadrangle, Utah-Colorado

Crow Knoll Moon Bottom Big PackMtn NE

Big PackMtn SE

Big PackMtn NW

Big Pack Mtn

Archy Bench Asphalt Wash SouthamCanyon

Duches Hole Nutters Hole Buck CampCanyon

ArchyBench SE

Rainbow

FirewaterCanyon North

FirewaterCanyon South

Dog Knoll AgencyDraw NE

AgencyDraw NW

Bates Knolls CooperCanyon

Pine SpringCanyon

Seep Canyon

Burnt TimberCanyon

Wolf Flat Flat RockMesa

Wolf Point Tom PattersonCanyon

Dragon

Davis Canyon

Rat Hole Ridge

Weaver Ridge

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Published geologic quadrangle maps

Unpublished photogeologic quadrangle mapsN

UTAHSeep Ridge Quadrangle

Sources of Map Data1. Cashion, W.B., 1974, Geologic map of the Southam Canyon quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-579, scale 1:24,000.2. Cashion, W.B., 1977, Geologic map of the Weaver Ridge quadrangle, Uintah County, Utah, and Rio Blanco County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map MF-824, scale 1:24,000;

modified by Sprinkel for this map.3. Cashion, W.B., 1984, Geologic map of the Agency Draw NW quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-1717, scale 1:24,000.4. Cashion, W.B., 1994, Geologic map of the Nutters Hole quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-2250, scale 1:24,000.5. Keighin, C.W., 1977a, Preliminary geologic map of the Cooper Canyon quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-874, scale 1:24,000.6. Keighin, C.W., 1977b, Preliminary geologic map of the Burnt Timber Canyon quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-875, scale 1:24,000.7. Keighin, C.W., 1977c, Preliminary geologic map of the Rainbow quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-893, scale 1:24,000.8. Pantea, M.P., 1987, Preliminary geologic map of the Davis Canyon quadrangle, Uintah County, Utah, and Garfield and Rio Blanco Counties, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map

MF-1933, scale 1:24,000.9. Pantea, M.P., and Scott, R.W., Jr., 1986, Preliminary geologic map of the Flat Rock Mesa quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-1866, scale 1:24,000;

modified by Sprinkel for this map.10. Pipiringos, G.N., 1978, Preliminary geologic map of the Bates Knolls quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-1025, scale 1:24,000.11. Pipiringos, G.N., 1979, Preliminary geologic map of the Agency Draw NE quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-1078, scale 1:24,000; modified by Sprinkel

for this map.12. Scott, R.W, Jr., and Pantea, M.P., 1985, Preliminary geologic map of the Dragon quadrangle, Uintah County, Utah, and Rio Blanco County, Colorado: U.S. Geological Survey Miscellaneous Field Studies Map

MF-1774, scale 1:24,000; modified by Sprinkel for this map.13. Scott, R.W, Jr., and Pantea, M.P., 1986, Preliminary geologic map of the Wolf Point quadrangle, Uintah County, Utah: U.S. Geological Survey Miscellaneous Field Studies Map MF-1839, scale 1:24,000.14. Sprinkel, D.A., 2007, Photogeologic mapping of the Pine Spring Canyon quadrangle, Uintah County, Utah: Utah Geological Survey unpublished map, scale 1:24,000.15. Sprinkel, D.A., 2008, Photogeologic map of the Archy Bench, Archy Bench SE, Asphalt Wash, Big Pack Mtn, Big Pack Mtn NW, Big Pack Mtn NE, Big Pack Mtn SE, Buck Camp Canyon, Dog Knoll, Firewater

Canyon South, Moon Bottom, Seep Canyon, Tom Patterson Canyon, and Wolf Flat quadrangles, Uintah County, Utah; Crow Knoll quadrangle, Duchesne and Uintah Counties, Utah; Duches Hole quadrangle, Carbon, Duchesne, and Uintah Counties, Utah; Firewater Canyon North, Carbon and Uintah Counties, Utah; and Rat Hole Ridge, Uintah County, Utah, and Garfield County, Colorado: Utah Geological Survey unpublished maps, scale 1:50,000.

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UTAH

CO

LOR

ADO

Natural Buttes Field

Love Field

Rock House Field

Oil Springs Field

Uteland Butte Field

Flat Rock Field

Buck Canyon Field

Pine Springs Field

Main Canyon Field

Agency Draw Field

Seep Ridge Field

Bitter Creek Field

Eight Mile Flat North Field

Hill Creek Field

Wolf Point Field

Seep Ridge B Field

Hell's Hole Field

Naval Reserve Field

Bonanza FieldPariette Bench Field

Evacuation Creek Field

Alger Pass Field

Davis Canyon Field

Crooked Canyon Field

Devil's Playground Field

! Producing Oil Well! Producing Gas Well! Plugged and Abandoned

General Field Boundaries

0 4010 20 30 Kilometers

Oil and Gas Fields in Utah Portion of the Seep Ridge 30' x 60' Quadrangle

WELL SYMBOLS FOR BORE HOLES ON MAP AND CROSS SECTION(Label next to well symbol is keyed to well ID in tables on plate 3)

Plugged and abandoned

Producing gas well

Abandoned gas well

Shut-in gas well

MAP SYMBOLS

FOLD AXIS Anticline

Syncline

MAHOGANY OIL-SHALE ZONEZone of oil-shale beds about 150 m below top of the Parachute Creek Member of Green River Formation in the north and at or near the base of the Member in the south; the Mahogany oil-shale zone is about 20-30 m thick; the line on the map and cross section represents the approximate location of the richest bed called the Mahogany “ledge”, which is about 1-9 m thick (thins southeastward) and about 10-12 m below the top of the zone.

GILSONITE VEINSolid where exposed, dashed where approximately located, and dotted where concealed; locations from Boden and Tripp (2008); Cashion (1974, 1977); Keighin (1977c); Pantea (1987); Scott and Pantea (1985); Boden, Tripp, and Rippy (Utah Geological Survey confidential and unpublished mapping).

STRIKE AND DIP OF BEDDINGHorizontalInclined

25

FAULTSteeply dipping - Dashed where approximately located; dotted where concealed; queried where inferred; bar and ball on downthrown side where offset is known; some faults along Nine Mile Canyon, Seep Ridge, and Flat Rock Mesa area may also have oblique offset.

HORSE BENCH SANDSTONE BEDBrownish- to yellowish-orange, tuffaceous sandstone and siltstone interbedded with marlstone in the Parachute Creek Member of the Green River Formation; about 1-15 m thick and about 100-135 m above the top of Mahogany oil-shale zone; a marker bed that generally forms a prominent topographic bench; also mapped as tuffaceous unit by Cashion (1974, 1977), Keighin (1977a, 1977b, 1977c); incompletely mapped by Pipiringos (1978); mapped as base of contorted tuffaceous sequence by Scott and Pantea (1985).

CONTACTIncludes approximately locatedGRADATIONAL CONTACTOn the geologic map (plate 1), this symbol represents the transition from Tua to Tgsl along southwest flank of Big Pack Mountain; on the cross section (plate 3), this symbol represents a change in lithofacies or a change in unit labels; see Description of Map Units on plate 2 for more information.

TABLES OF WELL TOPS USED IN CROSS SECTION AND REGIONAL CONTROL

IDCross

Section Well Information FormationUnit

SymbolTop

(meters)Thickness(meters)

Elevation(meters)

Top(feet)

Thickness(feet)

Elevation(feet) Comments and Source of Tops (Sprinkel picked tops for this report unless otherwise noted)

AA01 A-A' Kerr-McGee Oil & Gas Onshore Member B of Uinta Formation Tub 0 222 1552 0 730 5093 Ground elevation of wellNBU 46N Member A of Uinta Formation Tua 222 61 1330 730 200 4363NW1/4SE1/4 Section 4, T. 10 S., R. 22 E. Parachute Creek Member of Green River Formation Tgp 283 896 1269 930 2940 4163Salt Lake Base & Meridian Mahogany oil-shale zone 621 931 2038 3055Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 1179 133 373 3870 435 1223API: 4304730513 Green River-Wasatch Formations transition zone Tg-Tw 1312 71 240 4305 235 788 base Long Point BedNatural Buttes field Wasatch Formation Tw 1383 384 169 4540 1260 553 base of ostracodal limestone

Total Depth 1767 -215 5800 -707 well bottoms in Wasatch Formation

AA02 A-A' Gas Producing Enterprises Member B of Uinta Formation Tub 0 70 1560 0 230 5117 Ground elevation of wellUte Trail #3 Member A of Uinta Formation Tua 70 115 1490 230 380 4887 top estimated from projecting surface outcrop, regional dip, and local thicknessNE1/4NE1/4 Section 16, T. 10 S., R. 22 E. Parachute Creek Member of Green River Formation Tgp 185 949 1374 610 3112 4507Salt Lake Base & Meridian Mahogany oil-shale zone 598 961 1965 3152Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 1134 44 425 3722 145 1395API: 4304715378 Green River-Wasatch Formations transition zone Tg-Tw 1178 104 381 3867 341 1250 base Long Point BedNatural Buttes field Wasatch Formation Tw 1282 393 277 4208 1290 909 base of ostracodal limestone

Total Depth 1675 -116 5498 -381 well bottoms in Wasatch Formation

AA03 A-A' Kerr-McGee Oil & Gas Onshore Member B of Uinta Formation Tub 0 85 1670 0 280 5478 Ground elevation of wellNBU #351 Member A of Uinta Formation Tua 85 125 1584 280 410 5198SE1/4SE1/4 Section 30, T. 10 S., R. 22 E. Parachute Creek Member of Green River Formation Tgd 210 884 1459 690 2901 4788Salt Lake Base & Meridian Mahogany oil-shale zone 551 1118 1809 3669Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 1094 96 575 3591 314 1887API: 4304733668 Green River-Wasatch Formations transition zone Tg-Tw 1190 119 479 3905 390 1573 base Long Point BedNatural Buttes field Wasatch Formation Tw 1309 693 361 4295 2275 1183 base of ostracodal limestone

upper Mesaverde Group Kmv 2002 437 -333 6570 1432 -1092Sego Sandstone of Mesaverde Group Kmv 2439 87 -769 8002 288 -2524Buck Tongue of Mancos Shale Kmv 2526 130 -857 8290 425 -2812 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 2656 26 -987 8715 86 -3237Mancos Shale Kms 2682 30 -1013 8801 99 -3323Total Depth 2712 -1043 8900 -3422 well bottoms in Mancos Shale

AA04 A-A' Kerr-McGee Oil & Gas Onshore Member B of Uinta Formation Tub 0 70 1699 0 230 5574 Ground elevation of wellBitter Creek 1122-5G Member A of Uinta Formation Tua 70 88 1629 230 290 5344 top estimated from projecting surface outcrop, regional dip, and local thicknessSW1/4NE1/4 Section 5, T. 11 S., R. 22 E. Parachute Creek Member of Green River Formation Tgp 158 814 1540 520 2670 5054 top estimated from projecting surface outcrop, regional dip, and local thicknessSalt Lake Base & Meridian Mahogany oil-shale zone 399 1300 1310 4264 top estimated from structure maps by Johnson and Roberts (2003)Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 972 110 727 3190 362 2384API: 4304735637 Green River-Wasatch Formations transition zone Tg-Tw 1082 130 616 3552 425 2022 base Long Point BedBitter Creek field Wasatch Formation Tw 1212 745 487 3977 2444 1597 base of ostracodal limestone

upper Mesaverde Group Kmv 1957 427 -258 6421 1402 -847Sego Sandstone of Mesaverde Group Kmv 2384 199 -685 7823 652 -2249Total Depth 2583 -884 8475 -2901 well bottoms in Mesaverde Group

AA05 A-A' Kerr-McGee Oil & Gas Onshore member B of Uinta Formation Tub 0 30 1735 0 100 5693 Ground elevation of wellLove 1121-15P member A of Uinta Formation Tua 30 137 1705 100 450 5593 top estimated from local thickness and regional dipSE1/4SE1/4 Section 15, T. 11 S., R. 21 E. Parachute Creek Member of Green River Formation Tgp 167 812 1568 550 2665 5143 top estimated from local thickness and regional dipSalt Lake Base & Meridian Mahogany oil-shale zone 460 1275 1510 4183 top from log and structure maps by Johnson and Roberts (2003)Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 979 72 755 3215 236 2478API: 4304736673 Green River-Wasatch Formations transition zone Tg-Tw 1051 104 683 3451 339 2242 base of Long Point BedLove field Wasatch Formation Tw 1155 690 580 3790 2265 1903 base of ostracodal limestone

Mesaverde Group Kmv 1845 745 -110 6055 2445 -362Total Depth 2590 -856 8500 -2807 total logged depth 6387 feet; well bottoms in Mesaverde Group

AA06 A-A' XTO Energy Inc member B of Uinta Formation Tub 0 30 1725 0 100 5660 Ground elevation of wellFederal K 23-22 member A of Uinta Formation Tua 30 140 1695 100 460 5560 top estimated from local thickness and regional dipNE1/4SW1/4 Section 22, T. 11 S., R. 21 E. Parachute Creek Member of Green River Formation Tgp 170 773 1554 560 2535 5100 top estimated from local thickness and regional dipSalt Lake Base & Meridian Mahogany oil-shale zone 414 1311 1360 4300 top estimated from structure maps by Johnson and Roberts (2003)Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 943 62 782 3095 205 2565API: 4304733242 Green River-Wasatch Formations transition zone Tg-Tw 1005 110 719 3300 360 2360 base of Long Point BedLove field Wasatch Formation Tw 1115 728 610 3660 2388 2000 base of ostracodal limestone

upper Mesaverde Group Kmv 1843 478 -118 6048 1567 -388Sego Sandstone of Mesaverde Group Kmv 2321 128 -596 7615 420 -1955Buck Tongue of Mancos Shale Kmv 2449 53 -724 8035 174 -2375 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 2502 68 -777 8209 226 -2549Mancos Shale Kms 2570 38 -846 8435 122 -2775Total Depth 2608 -883 8557 -2897 well bottoms in Mancos Shale

AA07 A-A' Enduring Resources LLC member B of Uinta Formation Tub 0 30 1857 0 100 6092 Ground elevation of wellBig Pack 12-2-22-2 member A of Uinta Formation Tua 30 78 1826 100 257 5992 top estimated from local thickness and regional dipSE1/4NW1/4 Section 2, T. 12 S., R. 21 E. Parachute Creek Member of Green River Formation Tgp 108 720 1748 357 2361 5735Salt Lake Base & Meridian Mahogany oil-shale zone 304 1553 998 5094 top estimated from structure maps by Johnson and Roberts (2003)Uintah County, Utah Douglas Creek Member of Green River Formation Tgd 828 80 1028 2718 262 3374API: 4304736423 Green River-Wasatch Formations transition zone Tg-Tw 908 178 949 2980 585 3112 base Long Point BedBuck Canyon field Wasatch Formation Tw 1086 717 770 3565 2352 2527 base of ostracodal limestone

upper Mesaverde Group Kmv 1803 665 53 5917 2183 175 top from Utah Division of Oil, Gas and Mining recordsSego Sandstone of Mesaverde Group Kmv 2468 38 -612 8100 122 -2008 top from Utah Division of Oil, Gas and Mining recordsBuck Tongue of Mancos Shale Kmv 2506 17 -649 8222 56 -2130 top from Utah Division of Oil, Gas and Mining records; included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 2523 52 -666 8278 173 -2186 top from Utah Division of Oil, Gas and Mining recordsMancos Shale(?) Kms 2575 122 -719 8451 399 -2359 top from Utah Division of Oil, Gas and Mining recordsTotal Depth 2697 -841 8850 -2758 well likely bottoms in Mancos Shale

AA08 A-A' Gulf Oil Corporation member A of Uinta Formation Tua 0 131 1944 0 430 6378 Ground elevation of wellGray Knoll Federal #1 Parachute Creek Member of Green River Formation Tgp 131 247 1813 430 812 5948SW1/4NE1/4 Section 22, T. 12 S., R. 21 E. Mahogany oil-shale zone 339 1605 1113 5265 top from Johnson and Roberts (2003)Salt Lake Base & Meridian Douglas Creek Member of Green River Formation Tgd 378 384 1565 1242 1258 5136Uintah County, Utah Green River-Wasatch Formations transition zone Tg-Tw 762 125 1182 2500 412 3878 base Long Point Bed (modified from Johnson and Johnson, 1991; Dubiel, 2003)API: 4304730226 Wasatch Formation Tw 887 832 1056 2912 2728 3466 base of ostracodal limestone (verified from Johnson and Johnson, 1991; Dubiel, 2003)Buck Canyon field upper Mesaverde Group Kmv 1719 524 225 5640 1720 738

Sego Sandstone of Mesaverde Group Kmv 2243 147 -299 7360 484 -982Buck Tongue of Mancos Shale Kmv 2390 14 -447 7844 44 -1466 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 2404 106 -460 7888 347 -1510Mancos Shale Kms 2510 1260 -566 8235 4135 -1857Frontier Formation Kfd 3770 29 -1826 12370 95 -5992Mowry Shale Kfd 3799 15 -1855 12465 50 -6087Dakota Sandstone Kfd 3814 11 -1871 12515 35 -6137Cedar Mountain Formation KJcm 3825 62 -1881 12550 205 -6172Morrison Formation KJcm 3887 93 -1944 12755 305 -6377Stump Formation Jsc 3980 73 -2037 13060 239 -6682Entrada Sandstone Jsc 4053 69 -2110 13299 226 -6921Carmel Formation Jsc 4122 34 -2178 13525 112 -7147Nugget Sandstone JTRn 4156 255 -2213 13637 838 -7259Chinle Formation TRc 4411 72 -2468 14475 235 -8097Gartra Member of Chinle Formation TRc 4483 15 -2540 14710 49 -8332Moenkopi Formation TRm 4498 98 -2555 14759 320 -8381Maroon Formation lPma 4596 12 -2652 15079 41 -8701Morgan(?) Formation IPm 4608 24 -2665 15120 80 -8742Leadville Limestone Ml 4632 142 -2689 15200 466 -8822Total Depth 4774 -2831 15666 -9288 well bottoms in Leadville Limestone

AA09 A-A' IP Petroleum Company Parachute Creek Member of Green River Formation Tgp 0 334 1840 0 1096 6038 Ground elevation of wellAgency Draw 16-3 Mahogany oil-shale zone 237 1603 778 5260 top modified from Johnson and Roberts (2003)SE1/4SE1/4 Section 3, T. 13 S., R. 20 E. Douglas Creek Member of Green River Formation Tgd 334 348 1506 1096 1142 4942 top estimated from regional dip from top Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 682 90 1158 2238 298 3800 base of Long Point Bed estimated from structure maps by Johnson and Roberts (2003)Uintah County, Utah Wasatch Formation Tw 772 819 1067 2536 2687 3502 base of ostracodal limestoneAPI: 4304731510 upper Mesaverde Group Kmv 1591 452 248 5223 1482 815 top from Johnson and Roberts (2003)Agency Draw field Sego Sandstone of Mesaverde Group Kmv 2043 163 -203 6705 535 -667

Buck Tongue of Mancos Shale Kmv 2206 28 -366 7240 92 -1202 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 2234 88 -394 7332 288 -1294Mancos Shale Kms 2322 1248 -482 7620 4095 -1582Frontier Formation Kfd 3570 13 -1730 11715 43 -5677Mowry Shale Kfd 3583 32 -1743 11758 104 -5720Dakota Sandstone Kfd 3615 38 -1775 11862 123 -5824Cedar Mountain Formation KJcm 3653 53 -1813 11985 177 -5947Morrison Formation KJcm 3706 76 -1867 12162 248 -6124Stump Formation Jsc 3782 105 -1942 12410 345 -6372Entrada Sandstone Jsc 3887 93 -2047 12755 305 -6717Carmel Formation Jsc 3980 15 -2140 13060 48 -7022Navajo Sandstone JTRg 3995 22 -2155 13108 72 -7070 Glen Canyon GroupKayenta Formation JTRg 4017 35 -2177 13180 115 -7142 Glen Canyon GroupWingate Sandstone JTRg 4052 110 -2212 13295 363 -7257 Glen Canyon GroupChinle Formation TRcm 4162 86 -2323 13658 280 -7620Gartra Member of Chinle Formation TRcm 4248 13 -2408 13938 42 -7900Moenkopi Formation TRcm 4261 155 -2421 13980 510 -7942Maroon Formation lPma 4416 57 -2576 14490 188 -8452Morgan(?) Formation IPm 4473 22 -2633 14678 70 -8640Leadville Limestone Ml 4495 198 -2655 14748 652 -8710Total Depth 4693 -2854 15400 -9362 well bottoms in Leadville Limestone

Table 1. Wells on cross section A-A' showing formation topsID

CrossSection Well Information Formation

UnitSymbol

Top(meters)

Thickness(meters)

Elevation(meters)

Top(feet)

Thickness(feet)

Elevation(feet) Comments and Source of Tops (Sprinkel picked tops for this report unless otherwise noted)

AA10 A-A' Whiting Oil and Gas Company Parachute Creek Member of Green River Formation Tgp 0 67 2006 0 220 6581 Ground elevation of wellChimney Rock 32-14 Mahogany oil-shale zone 54 1951 180 6401 top estimated from structure maps by Johnson and Roberts (2003)SE1/4SW1/4 Section 32, T. 13 S., R. 21 E. Douglas Creek Member of Green River Formation Tgd 67 475 1939 220 1560 6361 top estimated from from top Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 542 139 1463 1780 456 4801 base Long Point Bed (modified from Johnson and Johnson, 1991; Dubiel, 2003)Uintah County, Utah Wasatch Formation Tw 681 743 1324 2236 2439 4345 base of ostracodal limestone (Utah Division of Oil, Gas and Mining records)API: 4304733448 upper Mesaverde Group Kmv 1424 343 581 4675 1125 1906Seep Ridge B Sego Sandstone of Mesaverde Group Kmv 1767 139 238 5800 455 781

Buck Tongue of Mancos Shale Kmv 1906 38 99 6255 125 326 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1944 103 61 6380 338 201 top from Utah Division of Oil, Gas and Mining recordsMancos Shale Kms 2047 1163 -42 6718 3814 -137 top estimated from local thickness and regional dipFrontier Formation Kfd 3210 15 -1204 10532 50 -3951Mowry Shale Kfd 3225 17 -1220 10582 56 -4001Dakota Sandstone Kfd 3242 42 -1237 10638 137 -4057Cedar Mountain Formation KJcm 3284 41 -1278 10775 134 -4194Morrison Formation KJcm 3325 73 -1319 10909 242 -4328Stump Formation Jsc 3398 88 -1393 11151 289 -4570Entrada Sandstone Jsc 3486 63 -1481 11440 204 -4859Total Depth 3549 -1543 11644 -5063 well bottoms in Entrada Sandstone

AA11 A-A' Whiting Oil and Gas Company Parachute Creek Member of Green River Formation Tgp 0 162 2283 0 532 7490 Ground elevation of wellUte Tribal 32-5A Mahogany oil-shale zone 118 2164 390 7100 top from Johnson and Roberts (2003)NE1/4SE1/4 Section 32, T. 14 S., R. 20 E. Douglas Creek Member of Green River Formation Tgd 162 407 2121 532 1338 6958 top estimated from top of Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 569 135 1713 1870 442 5620 base of Long Point Bed (modified from Johnson and Roberts, 2003)Uintah County, Utah Wasatch Formation Tw 704 649 1578 2312 2130 5178 base of ostracodal limestoneAPI: 4304710577 upper Mesaverde Group Kmv 1353 399 929 4442 1308 3048Flat Rock field Sego Sandstone of Mesaverde Group Kmv 1752 139 530 5750 455 1740

Buck Tongue of Mancos Shale Kmv 1891 36 392 6205 120 1285 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1927 92 355 6325 301 1165Mancos Shale Kms 2019 1164 263 6626 3819 864Frontier Formation Kfd 3183 22 -901 10445 73 -2955Mowry Shale Kfd 3205 19 -923 10518 62 -3028Dakota Sandstone Kfd 3224 23 -942 10580 75 -3090Cedar Mountain Formation KJcm 3247 83 -965 10655 273 -3165Morrison Formation KJcm 3330 48 -1048 10928 155 -3438Stump Formation Jsc 3378 142 -1095 11083 468 -3593Entrada Sandstone Jsc 3520 70 -1238 11551 229 -4061Carmel Formation Jsc 3590 17 -1308 11780 55 -4290Navajo Sandstone JTRg 3607 15 -1324 11835 50 -4345 Glen Canyon GroupKayenta Formation JTRg 3622 27 -1340 11885 90 -4395 Glen Canyon GroupWingate Sandstone JTRg 3649 84 -1367 11975 275 -4485 Glen Canyon GroupChinle Formation TRc 3733 93 -1451 12250 305 -4760Gartra Member of Chinle Formation TRc 3826 8 -1544 12555 25 -5065Precambrian YXm 3834 97 -1551 12580 317 -5090Total Depth 3931 -1648 12897 -5407 well bottoms in Precambrian rocks

AA12 A-A' Questar Exploration and Production Parachute Creek Member of Green River Formation Tgp 0 181 2269 0 595 7445 Ground elevation of wellFR 9P-36-14-19 Mahogany oil-shale zone 97 2172 320 7125 top from log and structure maps by Johnson and Roberts (2003)NW1/4SW1/4 Section 31, T. 14 S., R. 20 E. Douglas Creek Member of Green River Formation Tgd 181 421 2088 595 1381 6850 top estimated from top of Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 602 136 1667 1976 448 5469 base of Long Point Bed (estimated from structure map by Johnson and Roberts, 2003)Uintah County, Utah Wasatch Formation Tw 738 621 1530 2424 2036 5021 base of ostracodal limestone estimated from local thickness and regional dipAPI: 4304735880 upper Mesaverde Group Tgf 1359 361 910 4460 1185 2985Flat Rock field Sego Sandstone of Mesaverde Group Kmv 1720 156 549 5645 510 1800

Buck Tongue of Mancos Shale Kmv 1876 35 393 6155 115 1290 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1911 80 358 6270 265 1175Mancos Shale Kms 1991 1163 277 6535 3815 910Frontier Formation Kfd 3154 29 -885 10350 95 -2905Mowry Shale Kfd 3183 10 -914 10445 33 -3000Dakota Sandstone Kfd 3193 21 -924 10478 67 -3033Cedar Mountain Formation KJcm 3214 71 -945 10545 235 -3100Morrison Formation KJcm 3285 79 -1017 10780 260 -3335 top from Utah Division of Oil, Gas and Mining recordsStump Formation Jsc 3364 121 -1096 11040 395 -3595 top estimated from regional thicknessEntrada Sandstone Jsc 3485 81 -1216 11435 265 -3990Carmel Formation Jsc 3566 16 -1297 11700 55 -4255Navajo Sandstone JTRg 3582 16 -1314 11755 50 -4310 Glen Canyon GroupKayenta Formation JTRg 3598 31 -1329 11805 102 -4360 Glen Canyon GroupWingate Sandstone JTRg 3629 76 -1360 11907 251 -4462 Glen Canyon GroupChinle Formation TRc 3705 34 -1437 12158 112 -4713Gartra Member of Chinle Formation TRc 3739 28 -1471 12270 90 -4825Precambrian YXm 3767 28 -1498 12360 93 -4915Total Depth 3795 0 -1526 12453 -5008 well bottoms in Precambrian rocks

AA13 A-A' Wind River Resources Corporation Parachute Creek Member of Green River Formation Tgp 0 113 2266 0 374 7434 Ground elevation of wellNorth Hill Creek 10-10-15-20 Mahogany oil-shale zone 101 2164 334 7100 top estimated from structure maps by Johnson and Roberts (2003)NE1/4SW1/4 Section 10, T. 15 S., R. 20 E. Douglas Creek Member of Green River Formation Tgd 113 464 2152 374 1521 7060 top estimated from top of Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 577 158 1688 1895 519 5539 base of Long Point Bed modified from Johnson and Roberts (2003)Uintah County, Utah Wasatch Formation Tw 735 602 1530 2414 1973 5020 base of ostracodal limestoneAPI: 4304734830 upper Mesaverde Group Kmv 1337 400 929 4387 1313 3047 top Utah Division of Oil, Gas and Mining records were verifiedFlat Rock field Sego Sandstone of Mesaverde Group Kmv 1737 141 529 5700 462 1734

Buck Tongue of Mancos Shale Kmv 1878 19 388 6162 63 1272 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1897 87 369 6225 285 1209Mancos Shale Kms 1984 1137 282 6510 3731 924Frontier Formation Kfd 3121 29 -856 10241 94 -2807Mowry Shale Kfd 3150 10 -884 10335 35 -2901Dakota Sandstone Kfd 3160 23 -895 10370 74 -2936Cedar Mountain Formation KJcm 3183 72 -917 10444 236 -3010Morrison Formation KJcm 3255 76 -989 10680 250 -3246Stump Formation Jsc 3331 109 -1066 10930 358 -3496Entrada Sandstone Jsc 3440 82 -1175 11288 269 -3854Carmel Formation Jsc 3522 16 -1257 11557 53 -4123Navajo Sandstone JTRg 3538 11 -1273 11610 35 -4176 Glen Canyon GroupKayenta Formation JTRg 3549 30 -1284 11645 99 -4211 Glen Canyon GroupWingate Sandstone JTRg 3579 82 -1314 11744 268 -4310 Glen Canyon GroupChinle Formation TRc 3661 13 -1395 12012 43 -4578Total Depth 3674 -1408 12055 -4621 well bottoms in Chinle Formation

Table 1. (continued)ID

CrossSection Well Information Formation

UnitSymbol

Top(meters)

Thickness(meters)

Elevation(meters)

Top(feet)

Thickness(feet)

Elevation(feet) Comments and Source of Tops (Sprinkel picked tops for this report unless otherwise noted)

X01 Questar Exploration and Production Parachute Creek Member of Green River Formation Tgp 0 179 2223 0 590 7293 Ground elevation of wellWF 1P-1-15-19 Mahogany oil-shale zone 169 2054 555 6738 top estimated from structure maps by Johnson and Roberts (2003)NW1/4NW1/4 Section 6, T. 15 S., R. 20 E. Douglas Creek Member of Green River Formation Tgd 179 383 2043 590 1255 6703 top estimated from top of Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 562 169 1661 1845 555 5448 base of Long Point Bed modified from Johnson and Roberts (2003)Uintah County, Utah Wasatch Formation Tw 731 611 1491 2400 2005 4893 base of ostracodal limestoneAPI: 4304736781 upper Mesaverde Group Kmv 1342 361 880 4405 1185 2888Flat Rock field Sego Sandstone of Mesaverde Group Kmv 1703 179 519 5590 586 1703

Buck Tongue of Mancos Shale Kmv 1882 17 340 6176 56 1117 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1899 76 323 6232 248 1061Mancos Shale Kms 1975 1152 248 6480 3780 813Frontier Formation Kfd 3127 20 -904 10260 65 -2967 top from Utah Division of Oil, Gas and Mining recordsMowry Shale Kfd 3147 10 -924 10325 35 -3032 top estimated from regional thicknessDakota Sandstone Kfd 3157 22 -935 10360 70 -3067 top from Utah Division of Oil, Gas and Mining recordsCedar Mountain Formation KJcm 3179 67 -956 10430 220 -3137 top from Utah Division of Oil, Gas and Mining recordsMorrison Formation KJcm 3246 190 -1023 10650 625 -3357 top from Utah Division of Oil, Gas and Mining recordsStump Formation Jsc 3436 21 -1214 11275 70 -3982 top from Utah Division of Oil, Gas and Mining recordsEntrada Sandstone Jsc 3457 81 -1235 11345 265 -4052 top from Utah Division of Oil, Gas and Mining recordsCarmel Formation Jsc 3538 61 -1316 11610 200 -4317 top from Utah Division of Oil, Gas and Mining recordsGlen Canyon Group (Wingate Sandstone) JTRg 3599 86 -1377 11810 280 -4517 top from Utah Division of Oil, Gas and Mining recordsChinle Formation TRc 3685 94 -1462 12090 310 -4797 top from Utah Division of Oil, Gas and Mining recordsGartra Member of Chinle Formation TRc 3779 31 -1557 12400 100 -5107 top from Utah Division of Oil, Gas and Mining recordsMaroon Formation lPma 3810 167 -1587 12500 550 -5207 top from Utah Division of Oil, Gas and Mining recordsTotal Depth 3977 -1755 13050 -5757 well bottoms in Maroon Formation

X02 Texaco Inc. Parachute Creek Member of Green River Formation Tgp 0 237 2083 0 780 6834 Ground elevation of wellSeep Ridge Unit #2 (J Chorney C-2) Mahogany oil-shale zone 222 1860 731 6103 top estimated from structure maps by Johnson and Roberts (2003)SE1/4NE1/4 Section 3, T. 14 S., R. 22 E. Douglas Creek Member of Green River Formation Tgd 237 211 1845 780 691 6054 top estimated from top of Mahogany oil-shale zoneSalt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 448 137 1635 1471 451 5363 base of Long Point BedUintah County, Utah Wasatch Formation Tw 585 461 1497 1922 1511 4912 base of ostracodal limestoneAPI: 4304730135 upper Mesaverde Group Kmv 1046 453 1037 3433 1487 3401Seep Ridge field Sego Sandstone of Mesaverde Group Kmv 1499 173 583 4920 566 1914

Buck Tongue of Mancos Shale Kmv 1672 16 411 5486 54 1348 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1688 85 394 5540 280 1294Mancos Shale Kms 1773 1037 309 5820 3400 1014Frontier Formation Kfd 2810 97 -727 9220 320 -2386Mowry Shale Kfd 2907 9 -825 9540 30 -2706Dakota Sandstone Kfd 2916 10 -834 9570 31 -2736Cedar Mountain Formation KJcm 2926 50 -843 9601 163 -2767Morrison Formation KJcm 2976 87 -893 9764 288 -2930Stump Formation Jsc 3063 93 -981 10052 303 -3218Entrada Sandstone Jsc 3156 48 -1073 10355 160 -3521Carmel Formation Jsc 3204 11 -1122 10515 34 -3681 top from Utah Division of Oil, Gas and Mining recordsNavajo Sandstone JTRg 3215 57 -1132 10549 186 -3715 Glen Canyon GroupKayenta Formation JTRg 3272 26 -1189 10735 87 -3901 Glen Canyon GroupWingate Sandstone JTRg 3298 121 -1216 10822 398 -3988 Glen Canyon Group; top from Utah Division of Oil, Gas and Mining recordsChinle Formation TRcm 3419 53 -1337 11220 173 -4386 top from Utah Division of Oil, Gas and Mining recordsGartra Member of Chinle Formation TRcm 3472 11 -1390 11393 35 -4559 top from Utah Division of Oil, Gas and Mining recordsMoenkopi Formation TRcm 3483 52 -1400 11428 172 -4594Maroon Formation lPma 3535 159 -1453 11600 520 -4766 top from Utah Division of Oil, Gas and Mining recordsPrecambrian YXm 3694 10 -1611 12120 34 -5286 top from Utah Division of Oil, Gas and Mining recordsTotal Depth 3704 -1622 12154 -5320 well bottoms in Precambrian rocks

X03 Hot Rod Oil Parachute Creek Member of Green River Formation Tgp 0 341 2019 0 1120 6624 Ground elevation of wellGovt Chorney B-NCT-1 Mahogany oil-shale zone 126 1893 415 6209 top estimated from structure maps by Johnson and Roberts (2003)SE1/4SW1/4 Section 23 T. 13 S., R. 22 E. Douglas Creek Member of Green River Formation Tgd 341 303 1678 1120 995 5504Salt Lake Base & Meridian Green River-Wasatch Formations transition zone Tg-Tw 644 57 1374 2115 185 4509 base of Long Point BedUintah County, Utah Wasatch Formation Tw 701 538 1318 2300 1765 4324 base of ostracodal limestoneAPI: 4304730115 upper Mesaverde Group Kmv 1239 423 780 4065 1390 2559Seep Ridge field Sego Sandstone of Mesaverde Group Kmv 1662 157 356 5455 515 1169

Buck Tongue of Mancos Shale Kmv 1819 31 199 5970 100 654 included in Kmv on cross sectionCastlegate Sandstone of Mesaverde Group Kmv 1850 85 169 6070 280 554Mancos Shale Kms 1935 1068 84 6350 3505 274Frontier Formation Kfd 3003 102 -985 9855 335 -3231Mowry Shale Kfd 3105 10 -1087 10190 30 -3566Dakota Sandstone Kfd 3115 12 -1096 10220 40 -3596Cedar Mountain Formation KJcm 3127 39 -1108 10260 128 -3636Morrison Formation KJcm 3166 76 -1147 10388 250 -3764Stump Formation Jsc 3242 119 -1223 10638 392 -4014Entrada Sandstone Jsc 3361 49 -1343 11030 159 -4406Carmel Formation Jsc 3410 20 -1391 11189 66 -4565Navajo Sanstone JTRg 3430 62 -1412 11255 203 -4631Kayenta Formation JTRg 3492 8 -1473 11458 28 -4834Wingate Sandstone JTRg 3500 130 -1482 11486 426 -4862Chinle Formation TRcm 3630 44 -1612 11912 143 -5288Gartra Member of Chinle Formation TRcm 3674 8 -1655 12055 28 -5431Moenkopi Formation TRcm 3682 25 -1664 12083 80 -5459Maroon Formation lPma 3707 67 -1688 12163 220 -5539 top from Utah Division of Oil, Gas and Mining recordsMorgan Formation lPm 3774 17 -1755 12383 55 -5759Leadville Limestone Ml 3791 147 -1772 12438 484 -5814Devonian(?) D 3938 42 -1920 12922 138 -6298Precambrian YXm 3980 20 -1962 13060 65 -6436 top from Utah Division of Oil, Gas and Mining recordsTotal Depth 4000 -1982 13125 -6501 well bottoms in Precambrian rocks

X04 Phillips Petroleum Company Green River-Wasatch Formations transition zone Tg-Tw 0 792 2160 0 2600 7086 Ground elevation of wellTwo Waters Unit 1 Mancos Shale Kms 792 1158 1367 2600 3800 4486SW1/4SW1/4 Section 22, T. 14 S., R. 25 E. Frontier Formation Kfd 1951 109 209 6400 360 686Salt Lake Base & Meridian Dakota Sandstone Kfd 2060 37 99 6760 120 326 top from Utah Division of Oil, Gas and Mining recordsUintah County, Utah Morrison Formation KJcm 2097 182 63 6880 600 206 top from Utah Division of Oil, Gas and Mining records; includes Stump Formation thicknessAPI: 4304720508 Entrada Sandstone Jsc 2279 65 -120 7480 212 -394 top from Utah Division of Oil, Gas and Mining records; includes Carmel Formation thicknessWildcat Navajo Sandstone JTRg 2344 146 -185 7692 478 -606 top from Utah Division of Oil, Gas and Mining records

Chinle Formation TRc 2490 36 -330 8170 120 -1084 top from Utah Division of Oil, Gas and Mining records; Kayenta and Wingate tops not reportedGartra Member of Chinle Formation TRc 2526 9 -367 8290 30 -1204 top from Utah Division of Oil, Gas and Mining recordsMaroon Formation lPma 2535 108 -376 8320 352 -1234 top from Utah Division of Oil, Gas and Mining recordsLeadville Limestone Ml 2643 133 -483 8672 438 -1586 top from Utah Division of Oil, Gas and Mining recordsDevonian D 2776 51 -617 9110 168 -2024Cambrian Cc, Cl? 2827 30 -668 9278 97 -2192 top from Utah Division of Oil, Gas and Mining recordsTotal Depth 2857 -698 9375 -2289 well likely bottoms in Cambrian rocks

X05 Anschutz Exploration Company Douglas Creek Member of Green River Formation Tgd 0 345 1722 0 1135 5651 Ground elevation of wellTexas Creek 14-22 Green River-Wasatch Formations transition zone Tg-Tw 345 81 1376 1135 265 4516SE1/4SW1/4 Section 22 T. 11 S., R. 25 E. Wasatch Formation Tw 426 282 1296 1400 925 4251 base of Long Point BedSalt Lake Base & Meridian upper Mesaverde Group Kmv 708 348 1014 2325 1140 3326 base of ostracodal limestoneUintah County, Utah Sego Sandstone of Mesaverde Group Kmv 1056 334 666 3465 1097 2186API: 4304732693 Buck Tongue of Mancos Shale Kmv 1390 52 332 4562 170 1089 included in Kmv on cross sectionWildcat Castlegate Sandstone of Mesaverde Group Kmv 1442 69 280 4732 228 919

Mancos Shale Kms 1511 1092 211 4960 3583 691Frontier Formation Kfd 2603 42 -881 8543 137 -2892Mowry Shale Kfd 2645 30 -923 8680 98 -3029Dakota Sandstone Kfd 2675 26 -953 8778 84 -3127Cedar Mountain Formation Kcm 2701 78 -979 8862 258 -3211Morrison Formation KJcm 2779 107 -1057 9120 350 -3469Stump Formation Jsc 2886 40 -1164 9470 131 -3819Entrada Sandstone Jsc 2926 63 -1204 9601 207 -3950Carmel Formation Jsc 2989 13 -1267 9808 42 -4157Navajo Sanstone JTRg 3002 20 -1280 9850 66 -4199Kayenta Formation JTRg 3022 30 -1300 9916 99 -4265Wingate Sandstone JTRg 3052 130 -1330 10015 427 -4364Chinle Formation TRcm 3182 58 -1460 10442 188 -4791Gartra Member of Chinle Formation TRcm 3240 6 -1518 10630 22 -4979Moenkopi Formation (?) TRcm 3246 143 -1524 10652 468 -5001Park City Formation Pp 3389 29 -1667 11120 95 -5469Maroon Formation lPma 3418 148 -1696 11215 485 -5564 Interbedded fluvial and eolian beds; Maroon-Weber interfingeringTotal Depth 3566 -1844 11700 -6049 well bottoms in Maroon Formation

X06 Phillips Petroleum Company Parachute Creek Member of Green River Formation Tgp 0 54 1535 0 500 5037 Ground elevation of well; approximately 350 feet below Mahogany oil-shale zoneWatson Fee #2 Douglas Creek Member of Green River Formation Tgd 54 98 1480 180 320 4857 from sample logNW1/4NW1/4 Section 34 T. 9 S., R. 25 E. Green River-Wasatch Formations transition zone Tg-Tw 152 219 1383 500 720 4537 base of Long Point Bed from sample logSalt Lake Base & Meridian Wasatch Formation Tw 371 308 1163 1220 1010 3817 base of ostracodal limestone from sample logUintah County, Utah upper Mesaverde Group Kmv 679 342 856 2230 1123 2807 top from sample logAPI: 4304710916 Sego Sandstone of Mesaverde Group Kmv 1021 222 513 3353 727 1684 top from sample logWildcat Buck Tongue of Mancos Shale Kmv 1243 60 292 4080 195 957 top from sample log; included in Kmv on cross section

Castlegate Sandstone of Mesaverde Group Kmv 1303 41 232 4275 135 762 top from sample logMancos Shale Kms 1344 1214 191 4410 3985 627 top from sample logFrontier Formation Kfd 2558 37 -1024 8395 120 -3358 top from sample logMowry Shale Kfd 2595 21 -1060 8515 69 -3478 top from sample logDakota Sandstone Kfd 2616 28 -1081 8584 91 -3547Cedar Mountain Formation KJcm 2644 96 -1109 8675 315 -3638Morrison Formation KJcm 2740 91 -1205 8990 300 -3953Stump Formation Jsc 2831 73 -1296 9290 240 -4253Entrada Sandstone Jsc 2904 68 -1369 9530 222 -4493Carmel Formation Jsc 2972 18 -1437 9752 60 -4715Nugget Sandstone JTRn 2990 182 -1455 9812 598 -4775Chinle Formation TRcm 3172 112 -1638 10410 365 -5373Gartra Member of Chinle Formation TRcm 3284 9 -1749 10775 30 -5738Moenkopi Formation TRcm 3293 125 -1758 10805 410 -5768Maroon Formation lPma 3418 526 -1883 11215 1725 -6178 Interbedded fluvial and eolian beds; Maroon-Weber interfingeringMorgan Formation lPm 3944 140 -2409 12940 460 -7903Leadville Limestone Ml 4084 42 -2549 13400 138 -8363Total Depth 4126 -2591 13538 -8501 well bottoms in Leadville Limestone

Table 2. Wells used for stratigraphic control showing formation tops

UTAH GEOLOGICAL SURVEYa division ofUtah Department of Natural Resources

Plate 3Utah Geological Survey Open-File Report 549DM

Interim Geologic Map of the Seep Ridge 30' x 60' Quadrangle


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