U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Gilman

Usage:

Gilman Sandstone of Chaffee Group (CO*)


Geologic age:

Late Devonian or Early Mississippian(?)*


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

Named from exposures on cliffs of Eagle Canyon, at Gilman, Pando area, [Minturn 7.5-min quadrangle], Eagle Co., west-central CO (Tweto, 1949).


AAPG geologic province:

Eagle basin*
Piceance 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 ([ ]).