Usage:
Chatsworth Formation (CA)
Geologic age:
Late Cretaceous (Campanian to Maastrichtian)
Type section, locality, area and/or origin of name:
Type section: exposures along Woolsey Canyon Road and Black Canyon Road from Valley Circle Boulevard to base of Simi Conglomerate in Santa Susana Knolls, eastern Simi Hills, Los Angeles and Ventura Cos., CA. Named from community of Chatsworth, Los Angeles Co. (Colburn and others, 1981).
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 ([ ]).