USGS Visual Identifier
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Geologic Unit: Antelope Valley

Antelope Valley Limestone of Pogonip Group (CA*,NV*)

Ordovician, Early*
Ordovician, Middle*
Geologic Province:
Great Basin province*

Areal Extent:

Type Locality:
[Presumably] Martin Ridge, in T. 15 N., R. 49 E., which separates Copenhagen Canyon on west from Antelope Valley on east, south Eureka Co., NV (Nolan and others, 1956; McKee, 1976).

(alphabetical): Aysees Member (NV*), Paiute Ridge Member (CA,NV*), Ranger Mountains Member (CA*,NV*).

Unit Name History:
Name proposed for the uppermost formation of Pogonip Group (Nolan and others, 1956).
Age modified (Yochelson, 1957).
Areal limits (Roberts and others, 1958; Kay, 1960).
Includes (ascending) Pauite Ridge, Ranger Mountains, and Aysees Members (Byers and others, 1961).
Age modified (Merriam, 1963).
Areal limits (Ross, 1964; Burchfiel and others, 1974).
Age modified (Ross and others, 1975; McKee, 1976).
Areal limits (Hose, 1983; Maldonado and Schmidt, 1991; Monsen and others, 1992).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013