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UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY
PRELIMINARY GEOLOGIC MAP OF THE THERMOPOHS 1° x 2° QUADRANGLE CENTRAL foDOMING
Compiled by J. D. Love, Ann Coe Christiansen, T. M. Bown, and
J. L. Earle
Open-File Report 79-962 1979
This map is preliminary: it is incomplete in places and has hanging contacts; it has not been reviewed for edge joins.

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LISTOF MAP UNITS
SURFICIALDEPOSITS (HOLOCENE AND PLEISTOCENE) Alluvium Alluvium and colluvium Colluviura Terrace deposits Terrace and pediment gravels Pediment gravels Landslide deposits Includes some talus deposits Landslide and glacial deposits Terrace gravel and glacial outwash deposits Glacial deposits Windblown sand Travertine deposits Alluvial fan deposits
bASALT (PLEISTOCENE) BASALT FLOWS AND INTRUSIVES (PLIOCENE) CALDWELL CANYON VOLCANICS (MIOCENE OR YOUNGER) INTRUSIVE ROCKS (EOCENE)
Granodiorite Dacite Andesite Rhyolite POST-WIND RIVER DIKE (POST-LOWER EOCENE) In T. 2 N., R. 2 W.
(WindRiver Meridian) EOCENE ROCKS UNDIVIDED UPPER AND MIDDLE EOCENE ROCKS May include younger rocks
locally Wagon Bed Formation UPPER(?) AND MIDDLE EOCENE ROCKS Wiggins Formation Tepee Trail Formation Wiggins and Tepee Trail Formations AYCROSS FORMATION (MIDDLE EOCENE) TROUT PEAK TRACHYANDESITE (MIDDLE EOCENE) AND WAPITI FORMATION
(MIDDLEOR LOWER EOCENE) LOWER EOCENE ROCKS
Wasatch Formation Willwood Formation Wind River Formation Indian Meadows Formation Conglomerate beds LOWER EOCENE AND PALEOCENE ROCKS FORT UNION FORMATION (PALEOCENE) LANCE FORMATION (UPPER CilETACEOUS) MEETEETSE FORMATION (UPPER CRETACEOUS) LANCE AND MEETEETSE FORMATIONS (UPPER CRETACEOUS) MESAVERDE FORMATION (UPPER CRETACEOUS) CODY SHALE (UPPER CRETACEOUS) MESAVERDE FORMATION AND CODY SHALE (UPPER CRETACEOUS)

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FRONTIER FORMATION (UPPER CRETACEOUS) MOWRY AND THERMOPOLIS SHALES (LOWER CRETACEOUS) FRONTIER FORMATION AND MOWRY AND THERMOPOLIS SHALES (UPPER AND
LOWER CRETACEOUS) CLOVERLY FORMATION (LOWER CRETACEOUS) AND MORRISON FORMATION
(UPPER JURASSIC) SUNDANCE' FORMATION (UPPER AND MIDDLE JURASSIC) SUNDANCE FORMATION (UPPER AND MIDDLE JURASSIC) AND GYPSUM
SPRING FORMATION (MIDDLE JURASSIC) NUGGET SANDSTONE (JURASSIC? AND TRIASSIC?) SUNDANCE, GYPSUM SPRING, AND NUGGET FORMATIONS (UPPER AND
MIDDLE JURASSIC AND JURASSIC? AND TRIASSIC?) GYPSUM SPRING FORMATION AND NUGGET SANDSTONE (MIDDLE JURASSIC
AND JURASSIC? AND TRIASSIC?) CHUGWATER FORMATION OR GROUP (TRIASSIC) AND DINWOODY FORMATION
(LOWER TRIASSIC) PARK CITY OR PHOSPHORIA FORMATION AND RELATED ROCKS (PERMIAN) TENSLEEP SANDSTONE (PENNSYLVANIA^ AND AMSDEN FORMATION
(PENNSYLVANIA AND UPPER MISSISSIPPIAN) MISSISSIPPIAN THROUGH CAMBRIAN ROCKS UNDIVIDED MADISON LIMESTONE (UPPER AND LOWER MISSISSIPPIAN) DARBY FORMATION (UPPER DEVONIAN) MADISON LIMESTONE AND DARBY FORMATION (UPPER AND LOWER
MISSISSIPPIAN MD UPPER DEVONIAN) BIGHORN DOLOMITE (UPPER ORDOVICIAN) CAMBRIAN ROCKS Includes Gallatin Limestone (Upper Cambrian),
Gros Ventre Formation (Upper and Middle Cambrian), and Flathead Sandstone (Middle Cambrian) MADISON LIMESTONE, BIGHORN DOLOMITE, AND CAMBRIAN ROCKS (UPPER
AND LOWER MISSISSIPPIAN, UPPER ORDOVICIAN, AND UPPER AND MIDDLE CAMBRIAN) BIGHORN DOLOMITE (UPPER ORDOVICIAN) AND UPPER AND MIDDLE CAMBRIAN ROCKS PRECAMBRIAN IGNEOUS AND METAMORPHIC ROCKS Diabase Granite Migmatite Ultraraafic rocks Gneiss Gneiss and migmatite into which felsic dike network has intruded QUARTZ MONZONITE AND METASEDIMENTARY ROCKS (ARCHEAN)
CONTACT Dashed where approximately located FAULTS Dotted where concealed
Normal fault Bar and ball on downthrown side Thrust fault Sawteeth on upper plate LAKE GLACIER

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SOURCES OF GEOLOGIC DATA 1. Andrews, D. S., Pierce, W. G., and Eargle, D. H., 1947, Geologic
map of the Big Horn Basin, Wyoming and Montana, showing terrace deposits and physiographic features: U.S. Geological Survey Oil and Gas Investigations Preliminary Map 71, scale 1:126,720. 2. Ary, M. D., 1959, Geology of the eastern part of the Thermopolis and Lucerne anticlines, Hot Springs County, Wyoming: University of Wyoming M.A. thesis, pi. 7, scale 1:21:120.

3. Berry, D. W., and Little.ton, R. T., 1961, Geology and ground-water resources of the Owl Creek area, Hot Springs County, Wyoming: U.S. Geological Survey Water-Supply Paper 1519, pi. 1, scale 1:63,360.
4. Bown, T. M., 1979, Geology and mammalian paleontology of the Sand Creek facies, lower Willwood Formation (lower Eocene), Washakie County, Wyoming: Wyoming Geological Survey Memoir 2, pi. 1, scale 1:160,000 (approx.).
5. ____,U.S. Geological Survey unpublished mapping, 1978, scale 1:24,000.
6. Eaton, J. G., and Sundell, K. A., unpublished mapping. 7. Flanagan, P. E., 1955, Geology of the Mud Creek area, Hot Springs
County, Wyoming: University of Wyoming M.A. thesis, pi. 5, scale
1:21,120. 8. Granger, H. C., McKay, E. J., Mattick, R. E., Patten, L. L., and
Mcllroy, Paul, 1971, Mineral resources of the Glacier Primitive Area, Wyoming: U.S. Geological Survey Bulletin 1319-F, pi. 1, scale 1:62,500. 9. Horn, G. H., 1963, Geology of the East Thermopolis area, Hot Springs and Washakie Counties, Wyoming: U.S. Geological Survey Oil and Gas Investigations Map OM-213, scale 1:48,000. 10. Keefer, W. R., 1970, Structural geology of the Wind River Basin, Wyoming: U.S. Geological Survey Professional Paper 495-D, pi. 1, scale 1:250,000. 11. Ketner, K. B,, Keefer, W. R., Flshf.r, F. S., Smith, D. L.. and Raabe, R. G,, 1966, Mineral resources of the Stratified Primitive Area, Wyoming: U.S. Geological Survey Bulletin 1230-E, pi. 1, scale 1:125,000. 12. Kolm, K. E., 1974, ERTS MSS imagery.applied to mapping and economic evaluation of sand dunes in Wyoming: University of Wyoming Special Report under contract NAS 5-21799 (available from National Technical Information Service, Springfield, Virginia), fig. 1, scale 1:1,000,000. 13. Love, J. D., Weitz, J. L., and Hose, R. K., 1955, Geologic map of Wyoming: U.S. Geological Survey, scale 1:500,000. 14. Maughan, E. K., 1972, Geologic map of the Devil Slide quadrangle, Hot Springs County, Wyoming: U.S. Geological Survey Geologic Quadrangle Map GQ-1041 [1973], scale 1:24,000. 15. ____,1972, Geologic map of the Wedding of the Waters quadrangle, Hot Springs County, Wyoming: U.S. Geological Survey Geologic Quadrangle Map GQ-1042, scale 1:24,000. 16. Powell, J. D., 1957, The geology of the Blackrock Ridge area, Hot Springs and Fremont Counties, Wyoming: University of Wyoming M.A. thesis, pi. 2, scale 1:24,000. 17. Prostka, H. J., Antweiler, J. C., and Bieniewski, C. L., 1974, Mineral resources of the DuNoir Addition, Washakie Wilderness Area, Freraont County, Wyoming, with a section on Aeromagnetic survey, by M. D. Kleinkopf: U.S. Geological Survey Open-File Report 74-133, fig. 2, scale 1:125,000.

18. Richmond, G. M., 1945, Geology and oil possibilities of the northwest end of the Wind River Mountains, Sublette County, Wyoming: U.S. Geological Survey Oil and Gas Investigations Preliminary Map 31, scale 1:63,360.
19. Rohrer, W. L., 1965, Geologic map of the Adam Weiss Peak quadrangle, Hot Springs and Park Counties, Wyoming: U.S. Geological Survey Geologic Quadrangle Map GQ-382, scale 1:24,000.
20. ____,1968, Geologic map of the Fish Lake quadrangle, Fremont County, Wyoming: U.S. Geological Survey Geologic Quadrangle Map GQ-724, scale 1:24,000.
21. Thaden, R. E., 1976, Preliminary geologic map of the Birdseye Pass quadrangle, Fremont and Hot Springs Counties, Wyoming: U.S. Geological Survey Open-File Report 76-346, scale 1:24,000.
22. ____,1978, Geologic map of the Bonneville quadrangle, Fremont County, Wyoming: U.S. Geological Survey Geologic Quadrangle Map GQ-1439, scale 1:24,000.
23. Weitz, J. L., and Love, J. D., 1^52, Geologic map of the southern Big Horn Basin, Wyoming: Wyoming Geological Association Guidebook, 7th Annual Field Conference, southern Big Horn Basin, Wyoming, unnumbered map, scale 1:187,500.
24. Wilson, W. H., 1970, Geologic map of the Soapy Dale Peak quadrangle [Hot Springs and Park Counties, Wyoming]: Wyoming Geological Survey map, scale 1:24,000.
25. ____, unpublished mapping.

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United States Department Of The Interior Geological Survey