Usage:
No current usage.
(†Rock Creek Conglomerate Member of Maroon Formation (CO) replaced with †McCoy Formation, which has since been replaced with Minturn Formation. See Minturn.)
Geologic age:
Middle Pennsylvanian (Desmoinesian)
Type section, locality, area and/or origin of name:
Named for its fine exposures along west bank of Rock Creek north of McCoy, in Eagle and Routt Cos., northwestern CO, by H.D. Donner, unpub. thesis (Donner 1949).
AAPG geologic province:
Eagle 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 ([ ]).