Lamb Point Tongue of Navajo Sandstone

Usage of Geologic Unit Name:
Lamb Point Tongue of Navajo Sandstone (AZ*,UT*)
Jurassic, Early
Geologic Province:
Plateau sedimentary province*
Areal Extent:

Type Locality:
Not designated (Averitt and others, 1955).

Unit Name History:
Name credited to R.F. Wilson (unpub. report); First published use as a tongue of Navajo Sandstone of Glen Canyon Group (Averitt and others, 1955). Overview (Pillmore, 1956). Age modified (Peterson and Pipiringos, 1979).


Averitt, Paul, Wilson, R.F., Detterman, J.S., Harshbarger, J.W. and Repenning, C.A., 1955, Revisions in correlation and nomenclature of Triassic and Jurassic formations in southwestern Utah and northern Arizona: American Association of Petroleum Geologists Bulletin, v. 39, no. 12, p. 2515-2524.

Pillmore, C.L., 1956, Photogeologic map of the Kanab SW quadrangle, Kane County, Utah, Mohave County, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map, I-138, 1 sheet, scale 1:24,000.

Peterson, Fred and Pipiringos, G.N., 1979, Stratigraphic relationships of the Navajo Sandstone to Middle Jurassic formations in parts of southern Utah and northern Arizona, IN Unconformities, correlations, and nomenclature of some Triassic and Jurassic rocks, Western Interior United States: U.S. Geological Survey Professional Paper, 1035-B, p. B1-B43, Supersedes 1979, U.S. Geological Survey Open-File Report, OF-79-281, 179 p.

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Last modified: 1/7/2011