Park City Formation

Usage of Geologic Unit Name:
Park City Formation (CO*,ID*,MT*UT*,WY*)
Park City Group (NV*,UT*)
Permian, Early*
Leonardian, early late*
Guadalupian, early*

Geologic Province:
Wasatch uplift*
Uinta uplift*
Green River basin*
Great Basin province*
Yellowstone province*
Snake River basin*
Montana folded belt province*
Wind River basin*
Big Horn basin*

Areal Extent:
Type Locality:
Type section: Big Cottonwood Canyon , S/2 SW/4 sec. 9 and N/2 NW/4 sec. 16, T. 2 S., R. 3 E., Salt Lake Co., UT, Salt Lake Co., UT. Named after the Park City district, Summit Co., UT (Boutwell, 1907; McKelvey and others, 1959).

Group rank (alphabetical): Gerster Formation (NV*,UT*) or Gerster Limestone (NV*,UT*), Grandeur Formation (UT*), Indian Canyon Formation (NV,UT), Kaibab Limestone (NV*,UT*), Murdock Mountain Formation (NV*,UT*), Plympton Formation (NV*,UT*).

Formation rank (alphabetical): Ervay Member (WY*), Franson Member (CO*,ID*,MT*,UT*,WY*) or Fanson Tongue (CO*,ID*,MT*,UT*WY*), Grandeur Member (ID*,MT*,UT*,WY*) or Grandeur Tongue (ID*,MT*,UT*,WY*).
Unit Name History:
Named (Boutwell, 1907). Extended to Greater Green River basin (Schultz, 1914). Extended to Uinta basin; Divided into Grandeur and Franson Members (McKelvey and others, 1959). Revised (Schell and Yochelson, 1966; Cramer, 1971; Mytton and others, 1983). Age modified; Biostratigraphic dating (Behnken and others, 1986). Revised (Maughan, 1987).


Boutwell, J.M., 1907, Stratigraphy and structure of the Park City mining district, Utah: Journal of Geology, v. 15, no. 5, p. 434-458.

Schultz, A.R., 1914, Geology and geography of a portion of Lincoln County, Wyoming: U.S. Geological Survey Bulletin, 543, 141 p.

McKelvey, V.E., Cheney, T.M., Cressman, E.R., Sheldon, R.P., Swanson, R.W. and Williams, J.S., 1959, The Phosphoria, Park City, and Shedhorn formations in the western phosphate field, IN Shorter contributions to general geology, 1936: U.S. Geological Survey Professional Paper, 313-A, p. A1-A47, Also, 1956, Summary description of Phosphoria, Park City, and Shedhorn Formations in western phosphate field, American Association of Petroleum Geologists, v. 40, no. 12, p. 2826-2863 (advance summary).

Schell, E.M. and Yochelson, E.L., 1966, Permian-Triassic boundary in eastern Uintah County, Utah, IN Geological Survey research 1966: U.S. Geological Survey Professional Paper, 550-D, p. D64-D68.

Cramer, H.R., 1971, Permian rocks from Sublett Range, southern Idaho: American Association of Petroleum Geologists Bulletin, v. 55, no. 10, p. 1787-1801.

Mytton, J.W., Morgan, W.A. and Wardlaw, B.R., 1983, Stratigraphic relations of Permian units, Cassia Mountains, Idaho, IN Miller, D.M., Todd, V.R., and Howard, K.E., editors, Tectonic and stratigraphic studies in the eastern Great Basin: Geological Society of America Memoir, 157, p. 281-303.

Behnken, F.H., Wardlaw, B.R. and Stout, L.N., 1986, Conodont biostratigraphy of the Permian Meade Peak Phosphatic Shale Member, Phosphoria Formation, southeastern Idaho: University of Wyoming Contributions to Geology, v. 24, no. 2, p. 169-190.

Maughan, E.K., 1987, Wind River Canyon, Wyoming, IN Beus, S.S., ed., Rocky Mountain Section of the Geological Society of America, Centennial field guide: Geological Society of America, Rocky Mountain Section, The Decade of North American Geology (DNAG), Centennial Field Guide, v. 2, p. 191-196.

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Last modified: 1/7/2011