Usage:
Atwell Gulch Member of Wasatch Formation (CO*)
Geologic age:
early Tertiary (late Paleocene; Tiffanian NALMA)*
Type section, locality, area and/or origin of name:
Type locality: along Atwell Gulch, a tributary of Plateau Creek, west of town of Molina, Mesa Co., CO (Donnell, 1969).
Reference section: in N/2 sec. 26, and S/2 sec. 23, T. 9 S., R. 97 W., Mesa Co., CO (Donnell, 1969).
AAPG geologic province:
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 ([ ]).