Usage:
No current usage.
(Rocks of †Berkeley Group (CA*) reallocated to Contra Costa Group. See Contra Costa.)
Geologic age:
late Tertiary (Miocene)
Type section, locality, area and/or origin of name:
Named from exposures east of Berkeley, [Contra Costa Co.], San Francisco region, western CA (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Sacramento basin
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 ([ ]).