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National Geologic Map Database

Geologic Unit: Bruneau

Usage:

Bruneau Formation of Idaho Group (ID*)


Geologic age:

Quaternary (Pleistocene; latest Blancan to Irvingtonian NALMA)*


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

Typical exposures begin east of mouth of Bruneau River about 9 mi northwest of Bruneau and extend southeastward to pediment gravel 6 mi southeast of Bruneau. Named from exposures near town of Bruneau, Owyhee Co., southwestern ID. Named from town of Bruneau (Malde and Powers, 1962).


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 ([ ]).