Usage:
Fort Apache Member of Schnebly Hill Formation of Sedona Group (AZ*)
Geologic age:
early Permian (Leonardian)*
Type section, locality, area and/or origin of name:
Described in Fort Apache Indian Reservation (Stoyanow, 1936).
Reference section: on Cibecue Ridge, in SE/4 sec. 20, T. 7 N., R. 19 E., Gila Co., AZ (Finnell, 1966).
AAPG geologic province:
Basin-and-Range province*
Black Mesa basin*
Plateau sedimentary 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 ([ ]).