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National Geologic Map Database

NGMDB

Geologic Unit: Wanakah

Usage:

Wanakah Formation of San Rafael Group (AZ*,CO*,NM*,UT*)
Wanakah Formation (NM)


Subunits:

(alphabetical): Beclabito Member (AZ*,NM*,UT*), Bilk Creek Sandstone Member (CO*), Horse Mesa Member (AZ*,NM*,UT*), Junction Creek Sandstone Member (CO*), Pony Express Limestone Member (CO*), Todilto Limestone Member (AZ*,NM*).


Geologic age:

late Middle Jurassic (Callovian)*


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

Not designated. Named from exposures in Wanakah Mine, Ouray Co., CO (Burbank, 1930).


AAPG geologic province:

Black Mesa basin*
Las Vegas-Raton basin*
Paradox basin*
Piceance basin*
San Juan basin*
San Juan Mountains province*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).

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Page Last Modified: Tue Jun 3 17:35:37 2014