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National Geologic Map Database

Geologic Unit: Gibson Jack

Usage:

Gibson Jack Formation of Brigham Group (ID*)
Gibson Jack Formation (ID*)


Geologic age:

Cambrian, Early*
Cambrian, Middle*


Type section, locality, area and/or origin of name:

At head of Gibson Jack Creek, about 8 mi (12.8 km) south-southwest of Pocatello, in sec. 33, T. 7 S., R. 34 E., near Bannock-Power Co. line, ID. Named from exposures on Gibson Jack Creek, south of the Portneuf River, about 5 mi south of Pocatello, Bannock Co., ID (Crittenden and others, 1971).


AAPG geologic province:

Snake River 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 ([ ]).