Usage:
Doughnut Shale (CO*,UT)
Doughnut Formation (UT*)
Geologic age:
Mississippian, Late*
Type section, locality, area and/or origin of name:
In cliffs east and northeast of Doughnut Falls, in NE/4 sec. 19, T. 2 S., R. 3 E., Salt Lake Co., UT (Baker and Crittenden, 1961).
AAPG geologic province:
Wasatch uplift*
Green River basin*
Uinta basin*
Uinta uplift*
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 ([ ]).