Usage:
No current usage.
(†Butterfield Formation of Oquirrh Group (UT) considered abandoned. Rocks included in Butterfield Peaks Formation of Oquirrh Group. See Butterfield Peaks.)
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Type section: in secs. 10 and 15, T. 4 S., R. 3 W., Bingham district, Salt Lake Co., northern UT. Traverse begins at Butterfield Peak 9,360, and proceeds up section north along ridge into sec. 10, just above Tie Fork (Welsh and James, 1961).
AAPG geologic province:
Wasatch uplift
Great Basin province
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 ([ ]).