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National Geologic Map Database

Geologic Unit: Avenal

Usage:

Avenal Sandstone (CA*)
Avenal Formation (CA)


Geologic age:

early Tertiary (Eocene)*


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

Type section: in Big Tar Canyon [in sec. 18, T. 23 S., R. 17 E., Garza 7.5-min quadrangle, King Co., southern CA]. Named from Avenal wells at Tar Springs [in E/2 E/2 sec. 18, T. 23 S., R. 17 E., Diablo Range, Garza 7.5-min quadrangle, King Co., southern CA] (Anderson, 1905; Addicott, 1972).


AAPG geologic province:

San Joaquin 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 ([ ]).