Usage:
Fiftymile Member of Morrison Formation (UT*)
Geologic age:
Jurassic, Late*
Type section, locality, area and/or origin of name:
Type section: southeast side of northeast-trending ridge in SW/4 SE/4 sec. 11, and NW/4 NE/4 sec. 14, T. 41 S., R. 8 E., Kane Co., UT (Peterson, 1988).
AAPG geologic province:
Plateau sedimentary 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 ([ ]).