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National Geologic Map Database

Geologic Unit: Mariposa

Usage:

Mariposa Slate (CA*)
Mariposa Formation (CA*)


Subunits:

Brower Creek Volcanic Member (CA*).


Geologic age:

Late Jurassic*


Type section, locality, area and/or origin of name:

Named from exposures in Mariposa estate, Mariposa Co., CA (Becker, 1885).
Type area stated to be around Mariposa estate, southeast of Bagby, Mariposa Co., CA (Clark, 1964).


AAPG geologic province:

Sierra Nevada province


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).