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National Geologic Map Database

Geologic Unit: Crestone

Usage:

Crestone Conglomerate Member of Sangre de Cristo Formation (CO*)


Geologic age:

Middle Pennsylvanian (probably
Desmoinesian) to Early Permian (Wolfcampian)*


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

[Type locality not designated.] Named from exposures near Crestone, Saguache Co., Sangre de Cristo Range, southern central CO (Melton, 1925).
Principal reference section (=principal reference section of Sangre de Cristo Formation): northeast of Crestone in Groundhog Basin, [in NW/4 sec. 15, T. 44 N., R. 12 E., Lat. 38 deg. 03 min. 55 sec. N., Long. 105 deg. 39 min. 07 sec. W., Rito Alto Peak 7.5-min quadrangle], Saguache Co., southern central CO (Lindsey and Schaefer, 1984; see also Lindsey and others, 1985).


AAPG geologic province:

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 ([ ]).