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National Geologic Map Database

Geologic Unit: Rancheria

Usage:

Rancheria Formation (NM*,TX*)


Subunits:

Las Cruces Member (NM,TX).


Geologic age:

Early and Middle Mississippian (Tournaisian and Visean; Osagean and late Meramecian to early Chesterian)*


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

Type locality: on southwest side of small fork of shallow canyon that leaves west slope of Franklin Mountains, almost directly east of Vinton, SW/4 sec. 67, S. Blk. 82, El Paso Co., TX. Named from Rancheria Peak in Hueco Mountains, Otero Co., NM and El Paso Co., TX (Laudon and Bowsher, 1949).


AAPG geologic province:

Orogrande basin*
Pedregosa basin*


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 ([ ]).