- Usage in publication:
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- Fernwood Member*
- Modifications:
-
- Named
- Dominant lithology:
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- Sandstone
- Mudstone
- AAPG geologic province:
-
- Transverse Ranges province
Summary:
Type locality: exposures in vicinity of Fernwood, secs.18 and 19, T1S, R16W and secs.13 and 24, T1S, R17W, Santa Monica Mountains, Topanga quad, Los Angeles Co, CA. Is middle member of Topanga Canyon Formation. Recognized in Topanga and adjacent Malibu Beach 7.5' quads. Consists of sandstone interbedded with mudstone. Forms thick lenticular ledge-forming beds which are channeled and cross-bedded. Sandstone is fluvial to brackish-water and pebbly. Thickness is greater than 375 m. Conformably overlies and tongues into Saddle Peak Member (new); conformably underlies and tongues into Cold Creek Member (new) (both of Topanga Canyon Formation). Is middle 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 ([ ]).