Usage:
Calera Limestone (CA*)
Calera Limestone of Franciscan Complex (CA*)
Geologic age:
Early to Late Cretaceous (Aptian to Coniacian)
Type section, locality, area and/or origin of name:
Named from exposures in sea cliffs at lower end of Calera Valley, San Mateo Co., [Montara Mountain 7.5-min quadrangle], San Francisco region, western CA (Lawson, 1914; US geologic names lexicons, USGS Bull. 896, 1200).
Type locality stated to be along Pacific Ocean shoreline, 9.5 mi south of San Francisco North quadrangle, [in Calera Valley adjacent to Rockaway quarry, Montara Mountain 7.5-min quadrangle, San Mateo Co., western CA] (Schlocker, 1974).
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 ([ ]).