Usage:
Trout Peak Trachyandesite of Sunlight Group of Absaroka Volcanic Supergroup (WY*)
Trout Peak Trachyandesite of Sunlight Group (WY*)
Subunits:
Pacific Creek Tuff Member (WY*).
Geologic age:
early Tertiary (Eocene)*
Type section, locality, area and/or origin of name:
Type section: extends from top of Trout Peak, from 12,244 to 11,400 ft elevation, Park Co., WY. Named from exposures on Trout Peak, about 10 mi northwest of Wapiti Post Office (Nelson and Pierce, 1968).
AAPG geologic province:
Bighorn basin*
Yellowstone province*
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 ([ ]).