Usage:
Bridger Formation (CO*,UT*,WY*)
Subunits:
(alphabetical) --all in WY: Blacks Fork Member, Twin Buttes Member, Whiskey Butte Bed.
Geologic age:
early Tertiary (Eocene)*
Type section, locality, area and/or origin of name:
Named from exposures in vicinity of Fort Bridger, [Uinta Co., southwestern WY] (Hayden, 1869).
AAPG geologic province:
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 ([ ]).