Usage:
Carpenter Ridge Tuff (CO*)
Subunits:
(alphabetical) --all in CO*: Bachelor Mountain Member, Mammoth Mountain Member, Outlet Tunnel unit (informal), Phoenix Park Breccia Member, Shallow Creek Breccia Member, Wagon Wheel Gap Breccia Member.
Geologic age:
early Tertiary (late Oligocene; Chattian)*
Type section, locality, area and/or origin of name:
Type area: Carpenter Ridge, in T. 48 N., R. 3 W., [approx. Lat. 38 deg. 23 min. 18 sec. N., Long. 107 deg. 10 min. 56 sec. W., Carpenter Ridge 7.5-min quadrangle], Gunnison Co., southwestern CO (Olson and others, 1968).
AAPG geologic province:
Paradox basin*
Piceance basin*
San Juan basin*
San Juan Mountains province*
San Luis 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 ([ ]).