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National Geologic Map Database

Geologic Unit: Martin

Usage:

Martin Formation (AZ*)
Martin Limestone (CA*?, and AZ*-recognized locally in southern Cochise Co.)


Subunits:

(alphabetical) --all in AZ: Beckers Butte Sandstone Member*, Jerome Member*.


Geologic age:

Devonian, Middle*
Devonian, Late*


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

Named from Mount Martin on Escabrosa Ridge, Mule Mountains, Cochise Co., where formation is typically developed and well exposed (Ransome, 1904).
Type section: in SE/4 SE/4 sec. 7 and NE/4 NE/4 sec. 18, T. 23 S., R. 24 E., Bisbee quadrangle, Cochise Co., southeastern AZ (Ransome, 1904; Hayes and Landis, 1965).
Principal reference section: in SW/4 SE/4 sec. 9, T. 23 S., R. 23 E., Cochise Co., southeastern AZ (Hayes and Landis, 1965).


AAPG geologic province:

Pedregosa basin*
Basin-and-Range province*
Plateau sedimentary province*
Black Mesa 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 ([ ]).