Rock Springs Formation

Usage of Geologic Unit Name:
Rock Springs Formation*
Cretaceous, Late*
Geologic Province:
Green River basin*
Areal Extent:
Type Locality:
Not designated.
Unit Name History:
Name Rock Springs coal group changed to Rock Springs Formation (Sears, 1926). Revised; Overview (Hale, 1950). Revised (Hale, 1955). Overview (Gill and others, 1970). Biostratigraphic dating (Nichols, 1994).

Sears, J.D., 1926, Geology of the Baxter basin gas field, Sweetwater County, Wyoming, IN Contributions to economic geology (short papers and preliminary reports), 1925; Part 2, Mineral fuels: U.S. Geological Survey Bulletin, 781-B, p. B13-B27.

Hale, L.A., 1950, Stratigraphy of the Upper Cretaceous Montana Group in the Rock Springs uplift, Sweetwater County, Wyoming: Wyoming Geological Association Field Conference Guidebook, no. 5, p. 49-58.

Hale, L.A., 1955, Stratigraphy and facies relationship of the Montanan Group in south-central Wyoming, northeastern Utah, and northwestern Colorado, IN Camp, R.J., chairman, Green River basin: Wyoming Geological Association Field Conference Guidebook, no. 10, p. 89-94.

Gill, J.R., Merewether, E.A. and Cobban, W.A., 1970, Stratigraphy and nomenclature of some Upper Cretaceous and lower Tertiary rocks in south-central Wyoming: U.S. Geological Survey Professional Paper, 667, 53 p.

Nichols, D.J., 1994, A revised palynostratigraphic zonation of the nonmarine Upper Cretaceous, Rocky Mountain region, United States, IN Caputo, M.V., Peterson, J.A., and Franczyk, K.J., editors, Mesozoic systems of the Rocky Mountain Region, USA: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section.

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Last modified: 1/7/2011