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National Geologic Map Database

Geologic Unit: Maroon

Usage:

Maroon Formation (CO*)


Subunits:

(alphabetical) --all in CO: Chubb Member, Fryingpan Member*, Pony Spring Member, Schoolhouse Member*.


Geologic age:

Middle Pennsylvanian to Early Permian (Desmoinesian to Wolfcampian)*


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

Named from typical developments on Maroon Creek, [Aspen quadrangle, Pitkin Co.], western central CO (Eldridge, IN Emmons and others, 1894).


AAPG geologic province:

Eagle basin*
Piceance basin*
San Luis 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 ([ ]).