Usage:
Topanga Canyon Formation of Topanga Group (CA*)
Topanga Canyon Formation (CA)
Subunits:
(alphabetical) --all in CA*: Cold Creek Member, Encinal Member, Fernwood Member, Saddle Peak Member.
Geologic age:
Tertiary
Miocene, middle*
Type section, locality, area and/or origin of name:
Is "Topanga Canyon fauna" locality. Roadcuts on Old Topanga Road, in SW/4 sec. 35, T. 1 N., R. 17 W., Santa Monica Mountains, northeast corner Malibu Beach quadrangle, Los Angeles Co., CA (Yerkes and Campbell, 1979).
AAPG geologic province:
Los Angeles 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 ([ ]).