Usage:
Sego Sandstone of Mesaverde Group (CO*,UT*)
Sego Member of Iles Formation of Mesaverde Group (CO)
Sego Sandstone Member of Iles Formation of Mesaverde Group (CO,UT)
Geologic age:
Late Cretaceous (Campanian)*
Type section, locality, area and/or origin of name:
Village of Sego in Book Cliffs, Grand Co., UT (Erdmann, 1934).
Named from town of Sego, in T. 20 S., R. 20 E., Grand Co., UT. Type locality not designated (Fisher, 1936).
Type section: in Sego Canyon, in secs. 3, 15, 28, and 33, T. 20 S., R. 20 E., Grand Co., UT (Franczyk and others, 1990).
AAPG geologic province:
Paradox basin*
Piceance 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 ([ ]).