Usage:
Minturn Formation (CO*)
Subunits:
(alphabetical) all in CO: Chubb Member or Chubb Siltstone Member, Coffman Conglomerate Member* or Coffman Member*, Elk Ridge Limestone Member*, Hornsilver Dolomite Member*, Jacque Mountain Limestone Member*, Lionshead Dolomite Member, Resolution Dolomite Member*, Robinson Limestone Member*, Swissvale Gypsum Member, Wearyman Dolomite Member*, White Quail Limestone Member*.
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Type section: from sec. 22, T. 5 S., R. 80 W. to SE/4 sec. 13, T. 6 S., R. 81 W., Eagle Co., CO (Tweto and Lovering, 1977).
Reference section: in T. 44 N., R. 12 W., Custer Co., CO (Lindsey and others, 1985).
Named from exposures in cliffs along east side of Eagle Valley near Minturn, Eagle Co., CO (Tweto, 1949).
AAPG geologic province:
Denver basin*
Eagle basin*
Las Vegas-Raton basin*
Piceance basin*
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 ([ ]).