Usage:
Gopher Ridge Volcanics (CA*)
Geologic age:
Jurassic, Late*
Jurassic, Middle*
Type section, locality, area and/or origin of name:
Underlies and is named from Gopher Ridge, a prominent topographic feature near west side of exposed belt of metamorphic rocks between Stanislaus and Calaveras Rivers, lower western slopes of the Sierra Nevada, Calaveras Co., central 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 ([ ]).