Usage:
Big Skunk Formation of Montana Group (MT)
Geologic age:
Late Cretaceous
Type section, locality, area and/or origin of name:
Type section: exposed in roadcuts along MT Highway 20, in NE/4 and SW/4 sec. 21, T. 17 N., R. 5 W., Lewis and Clark Co., MT. Named from Big Skunk Creek, major tributary of Middle Fork of Dearborn River (Viele and Harris, 1965).
AAPG geologic 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 ([ ]).