Usage:
Wilson Grove Formation (CA*)
Geologic age:
Tertiary
Miocene, late*
Pliocene*
Type section, locality, area and/or origin of name:
Area between Wilson Grove and Mark West Creek, from 2.5 km due south to 11 km north of Sebastopol, in T. 8 N., R. 9 W., Sonoma Co., CA (Fox, 1983).
AAPG geologic province:
California Coast Ranges 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 ([ ]).