Usage:
Gibson Jack Formation of Brigham Group (ID*)
Gibson Jack Formation (ID*)
Geologic age:
Early to Middle Cambrian*
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).