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National Geologic Map Database

Geologic Unit: Bolsa

Usage:

Bolsa Quartzite (AZ*,CA*?,NM*)


Geologic age:

Middle Cambrian*


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

Named from Bolsa Canyon, [in T. 23 S., R. 23 E.], on southwest side of Escabrosa Ridge, Mule Mountains, Bisbee quadrangle, Cochise Co., southeastern AZ (Ransome, 1904).
Type section: in Spring Canyon, in NW/4 SE/4 SE/4 sec. 7, T. 23 S., R. 24 E., Escabrosa Ridge, Mule Mountains, Bisbee quadrangle, Cochise Co., southeastern AZ (Hayes and Landis, 1965).


AAPG geologic province:

Pedregosa basin*
Basin-and-Range 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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).