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National Geologic Map Database

Geologic Unit: Sedgwick Peak

Usage:

Sedgwick Peak Quartzite of Brigham Group (ID)
Sedgwick Peak Quartzite Member of Brigham Quartzite (ID*)


Geologic age:

Early Cambrian*


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

Type area: along crest of Portneuf Range from Sedgwick Peak north-northwest for about 5 mi, Bannock Co., ID.
Type section: exposures on southwest side of Twin Knobs, in SW/4 NE/4 sec. 12, T. 10 S., R. 38 E., Bannock and Caribou Cos., ID. Named from Sedgwick Peak, Portneuf Range (Oriel and others, 1971).


AAPG geologic province:

Snake River basin*
Wasatch uplift*


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 ([ ]).