Usage:
/Beaverhead Granite (ID,MT)
[Preoccupied. Name previously applied to Beaverhead Formation by Lowell and Klepper (1953) in MT.]
Geologic age:
early Tertiary (Eocene)
Type section, locality, area and/or origin of name:
Notable exposures in Beaverhead Range, along ID-MT State line. Described from occurrences in Beaverhead Co., southwestern MT (Scholten and others, 1955).
AAPG geologic province:
Idaho Mountains province
Montana folded belt
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 ([ ]).