Usage:
Simmler Formation (CA*)
Geologic age:
Tertiary
Oligocene, late*
Miocene, early*
Eocene, late(?)
Type section, locality, area and/or origin of name:
In T. 10 N., R. 25 W., 4 to 5 mi northeast of Cuyama, east of Cuyama Ranch quadrangle, southeast Caliente Range, southeast San Luis Obispo Co., CA (Hill and others, 1958).
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 ([ ]).