Usage:
No current usage.
(†Ingleside Chert of Franciscan Group (CA) or †Ingleside Chert Member of Franciscan Formation (CA) abandoned.)
Geologic age:
Jurassic and Cretaceous
Type section, locality, area and/or origin of name:
Named from exposures in San Miguel Hills, east of town of Ingleside, San Francisco 15-min quadrangle, San Francisco Co., CA (Lawson, 1914).
[Discrepancy: GNU records (USGS DDS-6; Menlo GNULEX) state unit is "named for exposures IN Ingleside, San Miguel Hills ..." --unresolved.]
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 ([ ]).