Usage:
Copper Basin Formation (ID*)
Copper Basin Group (ID*)
Subunits:
GROUP STATUS (alphabetical) --all in ID: Argosy Creek Formation*, Drummond Mine Limestone*, Little Copper Formation.
FORMATION STATUS (alphabetical) --all in ID: Drummond Mine Limestone Member*, Little Copper Member*.
Geologic age:
Mississippian*
Type section, locality, area and/or origin of name:
Type locality: exposures in upper part of Star Hope Creek, southern edge of Copper Basin depression, Mackay quadrangle, Custer Co., ID (Ross, 1962).
AAPG geologic province:
Idaho Mountains 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 ([ ]).