Usage:
State Bridge Formation (CO*)
State Bridge Siltstone (CO)
Subunits:
(alphabetical): Sloane Peak Member (CO*), South Canyon Creek Member (CO*), Yarmony Limestone Member (CO).
Geologic age:
Permian, Early*
Permian, Late*
Triassic, Early*
Type section, locality, area and/or origin of name:
Type section: on south slope of Yarmony Mountain, 0.3 mi north of State Bridge, [in sec. 23, T. 2 S., R. 83 W., State Bridge 7.5-min quadrangle], Eagle Co., CO. Named from State Bridge, Eagle Co., CO (Brill, 1942; see Donner, 1949).
AAPG geologic province:
Eagle 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 ([ ]).