Usage:
Duchesne River Formation (CO*,UT*)
Originally called Duchesne.
Subunits:
(alphabetical) --all in UT*: Brennan Basin Member, Dry Gulch Creek Member, Lapoint Member, Starr Flat Member.
Geologic age:
Eocene and Oligocene*
Type section, locality, area and/or origin of name:
First described along Duchesne River, Duchesne Co., UT (Peterson, 1932; Kay, 1934).
AAPG geologic province:
Uinta basin*
Piceance 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 ([ ]).