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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).