Usage:
Beaverhead Group (ID*,MT*)
Beaverhead Formation (ID*,MT*)
Beaverhead Conglomerate (ID,MT)
Subunits:
GROUP STATUS (alphabetical) --all in MT*: Lima Conglomerate, Little Sheep Creek conglomerate unit (informal), Red Butte Conglomerate.
Geologic age:
Late Cretaceous to early(?) Tertiary*
Type section, locality, area and/or origin of name:
Type section: near mouth of McKnight Canyon, 6 mi west of Dell, [in T. 12 S., R. 10 W.], Beaverhead Co., southwestern MT. Named from Beaverhead Co., southwestern MT (Lowell and Klepper, 1953).
AAPG geologic province:
Montana folded belt*
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 ([ ]).