Usage:
No current usage.
(Rocks of †Red Mountain Rhyolite (CO) included in Grizzly Peak Tuff. See Grizzly Peak.)
Geologic age:
early Tertiary (early Oligocene)
Type section, locality, area and/or origin of name:
Notable exposures on Red Mountain, in T. 12 S., R. 82 W., Chaffee Co., central CO (Howell, 1919).
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 ([ ]).