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National Geologic Map Database

Geologic Unit: Redwall

Usage:

Redwall Limestone (AZ*,NM*,UT*)
Redwall Marble (CA*)


Subunits:

(alphabetical): Anchor Member (UT), Arrowhead Member (UT), ?Bullion Member (UT), Dawn Dolomite Member (UT), Horseshoe Mesa Member (AZ*,UT*), Mooney Falls Member (AZ*,UT*), Thunder Springs Member (AZ*,UT*), Whitmore Wash Member (AZ*,UT*), Yellowpine Member (UT).


Geologic age:

Mississippian, Early*
Kinderhookian*
Osagean*
Mississippian, Late*
Meramecian*


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

Named from red appearance of its escarpment on either side of the Grand Canyon, northern AZ (Gilbert, 1875).
Type locality: Redwall Canyon, in Shinumo drainage basin, on north side of Grand Canyon, [Coconino County], northern AZ (Darton, 1910).


AAPG geologic province:

Great Basin province*
Plateau sedimentary province*
Basin-and-Range province*
Salton basin*
Black Mesa basin*


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 ([ ]).