Usage:
Fort Crittenden Formation (AZ*)
Fort Crittenden Formation of Sonoita Group (AZ)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Named from ruins of old fort near Casa Blanca Canyon, Patagonia Mountains, southeastern AZ (Stoyanow, 1949).
Reference section: between El Pilar Tank in Adobe Canyon, in SE/4 NW/4 sec. 24, T. 20 S., R. 15 E., and triangulation marker YOUNG on the east side of Hog Canyon, Santa Rita Mountains, southern Pima and northern Santa Cruz Cos., southeastern AZ (Drewes, 1968).
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 ([ ]).