Usage:
Libby Creek Group (WY*-Medicine Bow Mountains)
Libby Creek Group of Snowy Pass Supergroup (WY*-Medicine Bow Mountains)
Subunits:
(alphabetical) --all in WY: Bridger Peak Quartzite, /Copper Creek Conglomerate, Copperton Formation, /Cow Creek Conglomerate, French Slate*, Headquarters Formation*, Heart Formation*, Lookout Schist*, Medicine Peak Quartzite*, Nash Formation*, Quartzite Peak Quartzite, Rock Knoll Formation*, Sugarloaf Quartzite*, Towner Greenstone*.
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Not designated. Named from exposures at head of Libby Creek, east side of Medicine Bow Mountains, in T. 16 N., R. 79 W., Albany Co., WY (Houston and others, 1968).
AAPG geologic province:
Northern Rocky Mountain region*
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 ([ ]).