Usage:
Coffman Member of Minturn Formation (CO*)
Coffman Conglomerate Member of Minturn Formation (CO*)
[?] Coffman Formation (CO)
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Type section: in unnamed valley about 2 mi north of Coffman Park [now Kaufman Pasture], in sec. 24, T. 13 S., R. 77 W., [Antero Reservoir 7.5-min quadrangle, near Chaffee-Park Co. line], central CO (Gould, 1935).
AAPG geologic province:
Eagle basin*
South Park 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 ([ ]).