Usage:
Martin Formation (AZ*)
Martin Limestone (AZ*,CA*?)
Subunits:
(alphabetical) --all in AZ: Beckers Butte Sandstone Member*, Jerome Member*.
Geologic age:
Middle to Late Devonian*
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:
Basin-and-Range province*
Black Mesa basin*
Pedregosa basin*
Plateau sedimentary province*
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).