Usage:
Bachelor Mountain Member of Carpenter Ridge Tuff (CO*)
Subunits:
(alphabetical) --all informal, in CO*: Campbell Mountain welding zone, Willow Creek welding zone, Windy Gulch welding zone.
Geologic age:
early Tertiary (late Oligocene; Chattian)*
Type section, locality, area and/or origin of name:
Type area: Bachelor Mountain, northwest of Creede, Mineral Co., southwestern CO (Steven and Ratte, 1964).
AAPG geologic province:
San Juan Mountains province*
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 ([ ]).