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National Geologic Map Database

Geologic Unit: Horseshoe Mountain

Usage:

Horseshoe Mountain Group (CO)


Subunits:

(alphabetical): Dotsero Formation (CO), Manitou Limestone (CO), Peerless Formation (CO), Sawatch Sandstone (CO).


Geologic age:

Late Cambrian to Early Ordovician


Type section, locality, area and/or origin of name:

Type section: southeast facies in sec. 12, T. 10 S., R. 79 W.; northwest facies in sec. 15, T. 5 S., R. 87 W., Horseshoe Mountain near Fairplay, western Park Co., CO (Gerhard, 1972).


AAPG geologic province:

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