Usage:
Copperton Formation of Snowy Pass Group (WY*-recognized locally in Sierra Madre)
Copperton Formation of Libby Creek Group of Snowy Pass Supergroup (WY*-recognized locally in Medicine Bow Mountains)
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Type section: from SW/4 sec. 31 to S/2 sec. 29, T. 14 N., R. 86 W., Carbon Co., WY. Origin of name not stated by authors (Houston and others, 1992).
AAPG geologic province:
Northern Rocky Mountain region*
Green 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 ([ ]).