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National Geologic Map Database

Geologic Unit: Copper Hill

Usage:

Copper Hill Volcanics (CA*)


Geologic age:

Jurassic, Late*


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

Type section: along Cosumnes River, Amador and El Dorado Cos., CA. Named from inactive Copper Hill Mine, in NE/4 sec. 34, T. 8 N., R. 9 E., Amador Co., CA (Clark, 1964).


AAPG geologic province:

Sierra Nevada 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).