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- Usage in publication:
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- Danielson Member*
- Modifications:
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- Named
- Reference
- Dominant lithology:
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- Mudstone
- Siltstone
- AAPG geologic province:
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- Transverse Ranges province
Summary:
Type locality: exposures on Danielson Ranch, Big Sycamore Canyon, Santa Monica Mountains, Newbury Park quad, Ventura Co, CA. Reference locality: exposures in upper Trancas Canyon, west Point Dume 7.5' quad, Los Angeles, Co, CA. Consists of grayish-black mudstone and siltstone which are very fine-grained, thin- to medium-bedded and fossiliferous with local biostromes. Overlies Sespe Formation; conformably underlies San Nicholas Member (new) (Vaqueros 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 ([ ]).