Usage:
Sunnyside Member of Blackhawk Formation of Mesaverde Group (UT*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Not designated. Named from exposures near town of Sunnyside, Carbon Co., UT (Young, 1955).
Principal reference section in cliff north of Sunnyside, in NE/4 sec. 6, T. 15 S., R. 14 E., Carbon Co., UT (Maberry, 1971).
AAPG geologic province:
Uinta basin*
Paradox 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 ([ ]).