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National Geologic Map Database

Geologic Unit: Anchor

Usage:

Anchor Limestone of Monte Cristo Group (NV*)
Anchor Member of Monte Cristo Limestone (AZ*,CA*,NV?)
Anchor Member of Monte Cristo Dolomite (NV*-recognized locally in Sloan district)


Geologic age:

Early to Middle Mississippian (Tournaisian to Visean; Osagean)*


Type section, locality, area and/or origin of name:

Named from Anchor Mine, in sec. 23, T. 25 S., R. 58 E., Goodsprings [special] quadrangle, Clark Co., NV (Hewett, 1931).


AAPG geologic province:

Great Basin province*
Plateau sedimentary province*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

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

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).