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  • Usage in publication:
    • /Briceburg Formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Slate
  • AAPG geologic province:
    • Sierra Nevada province
Publication:

Bowen, O.E., 1963, Generalized geologic map to accompany road log from LeGrand to El Portal; Map 4: Geological Society of Sacramento Annual Field Trip Guidebook, p. 20-33.


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 ([ ]).

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