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 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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).