U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Fort Crittenden

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).