Usage:
Snowy Pass Supergroup (WY*-Medicine Bow Mountains)
Snowy Pass Group (WY*-Sierra Madre)
Subunits:
SUPERGROUP STATUS (alphabetical) --all in Medicine Bow Mountains, WY*: Deep Lake Group, Libby Creek Group.
GROUP STATUS (alphabetical) --all in Sierra Madre, WY*: Bottle Creek Formation, Copperton Formation, Singer Peak Formation, Slaughterhouse Formation.
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Type section [composite]: along WY Highway 130, from sec. 14, T. 16 N., R. 79 W., to sec. 23, T. 16 N., R. 80 W., where rocks between the French and Medicine Peak are exposed; continues into secs. 14, 15, and 16, T. 16 N., R. 80 W., where the rest of the formations are exposed, Carbon Co., WY. Named from Snowy Range Pass, in T. 16 N., R. 79 W., Medicine Bow Mountains, Albany Co., WY (Houston and others, 1992).
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 ([ ]).