Usage:
Concha Limestone of Naco Group (AZ*,NM*)
[?] Concha Limestone of Snyder Hill Group (AZ)
Geologic age:
Permian, Early*
Permian, Late(?)*
Type section, locality, area and/or origin of name:
Type section: on east end of Concha Ridge, a conspicuous transverse spur of Scherrer Ridge in Gunnison Hills, in NW/4 sec. 28, T. 15 S., R. 23 E., central Cochise Co., southeastern AZ (Gilluly and others, 1954).
Reference section (composite): in Mustang Mountains, in SW/4 sec. 14, and NE/4 sec. 15, T. 20 S., R. 18 E., Santa Cruz Co., AZ (Bryant and McClymonds, 1961).
AAPG geologic province:
Pedregosa basin*
Basin-and-Range province*
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 ([ ]).