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- Usage in publication:
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- /Briceburg Formation
- Modifications:
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- Named
- Dominant lithology:
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- Slate
- AAPG geologic province:
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- Sierra Nevada province
Summary:
Named as formation in Mariposa Group [of Taliaferro, 1933], Mariposa Co, CA. Composed of black silty slate. Is in apparently conformable depositional contact with Penon Blanco Formation (greenstone) [of Amador Group]. Is in fault contact with Paleozoic Hite Cove Formation (new). Age is uncertain; may be Late Jurassic and may be equivalent to Mariposa Slate. Formerly slates were considered to be part of Paleozoic Calaveras Formation.
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 ([ ]).