Usage:
Youghall Formation (CO,UT)
Geologic age:
Pennsylvanian
Type section, locality, area and/or origin of name:
Exposures on west side of Hell's Canyon, in sec. 31, T. 6 N., R. 102 W., and along east side of head of Hell's Canyon in W/2 sec. 7, T. 5 N., R. 102 W., Moffat Co., CO (Thompson, 1945).
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 ([ ]).