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National Geologic Map Database

Geologic Unit: Tejon

Usage:

Tejon Formation (CA*)
Tejon Group (CA)


Subunits:

GROUP STATUS (alphabetical) --all in CA: Cozy Dell Formation or Cozy Dell Shale, Matilija Formation.
FORMATION STATUS (alphabetical) --all in CA: Cozy Dell Shale Member, Liveoak Shale Member*, Matilija Sandstone Member, Metralla Sandstone Member*, Point of Rocks Sandstone Member, Reed Canyon Siltstone Member*, Uvas Conglomerate Member*.


Geologic age:

early Tertiary (Eocene)*


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

Named from occurrence in vicinity of Fort Tejon, Kern Co., western CA (US geologic names lexicons, USGS Bull. 896, 1200).
Type area: on north slope of Tehachapi Mountains at extreme south end of Joaquin Valley, between Pastoria Creek on the east and Tecuya Creek on the west (Marks, 1941).


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 ([ ]).