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National Geologic Map Database

Geologic Unit: Minturn

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).