- Usage in publication:
-
- San Nicholas Member*
- Modifications:
-
- Named
- Dominant lithology:
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- Sandstone
- AAPG geologic province:
-
- Transverse Ranges province
Summary:
Named as upper of 2 members of Vaqueros Formation. Type locality designated as exposures in San Nicholas Canyon, Santa Monica Mountains, east-central Triunfo Pass quad, Los Angeles Co, CA. Consists of light-gray to bluish-gray sandstone, 150 m thick. Is thick-bedded to massive, cliff-forming, and fossiliferous. Conformably overlies Danielson Member (new) (Vaqueros Formation); conformably underlies Encinal Member (new) (Topanga Canyon Formation). Is early Miocene age.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
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 ([ ]).