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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).