U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: San Pablo

Usage:

San Pablo Group (CA*)
San Pablo Formation (CA*)


Subunits:

(alphabetical) --all in CA*: Briones Sandstone, Cierbo Sandstone, Neroly Sandstone.


Geologic age:

late Tertiary (late Miocene)*


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

South side of San Pablo Bay near Union Oil refinery [and town of Rodeo], Contra Costa Co., CA (Merriam, 1898; Arnold, 1906).


AAPG geologic province:

Northern Coast Range province*
Sacramento basin*


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