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

Geologic Unit: Carrizo Mountain

Usage:

Carrizo Mountain Formation (TX*)
/Carrizo Mountain group (informal) (TX)

For informal usage, the rank or lithologic term should not be capitalized. [A "group" consists of 2 or more formations (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005).]


Geologic age:

Middle Proterozoic*


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

Named from Carrizo Mountains, El Paso Co. [now in Hudspeth Co.], TX (von Streeruwitz, 1891).


AAPG geologic province:

Southwestern Basin-and-Range region*


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 ([ ]).