Usage:
Rainvalley Formation of Naco Group (AZ*,NM*)
[?] Rainvalley Formation of Snyder Hill Group (AZ)
Geologic age:
Permian, Early*
Permian, Late*
Type section, locality, area and/or origin of name:
Type section: north of Rain Valley in Mustang Mountains, in NE/4 sec. 15, T. 20 S., R. 18 E., Santa Cruz Co., AZ (Bryant and McClymonds, 1961).
AAPG geologic province:
Basin-and-Range province*
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 ([ ]).