Hueco Group (NM,TX)
Hueco Limestone (NM*,TX*)
Hueco Formation (NM*,TX)
GROUP STATUS (alphabetical): Alacran Mountain Formation (NM,TX), Cerro Alto Formation (TX) or Cerro Alto Limestone (NM,TX), Hueco Canyon Formation (NM,TX), Powwow Conglomerate (TX).
FORMATION STATUS (alphabetical): Deer Mountain Shale Member (TX*), Kriz Limestone Lens (TX), Pendejo Tongue (NM), Powwow Conglomerate Member (NM,TX*) or Powwow Member (TX*).
early Permian (Wolfcampian and Leonardian)*
Named from exposures in Hueco Mountains, El Paso Co. [now in Hudspeth Co.], TX (Richardson, 1904).
Orogrande basin*
Permian 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 ([ ]).