Usage:
Atascadero Formation (CA*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Named from exposures along Atascadero Creek, [Atascadero 7.5-min quadrangle], San Luis Obispo Co., southern CA (Fairbanks, 1904).
Type locality: exposures mapped by Hart (1976) along Atascadero Creek, in T. 28 S., R. 12 E., south of Atascadero, San Luis Opispo Co., southern CA (Seiders, 1982; GNC index card files).
AAPG geologic province:
Coastal basins*
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 ([ ]).