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National Geologic Map Database

Geologic Unit: Oracle

Usage:

Oracle Granite (AZ)


Geologic age:

Middle Proterozoic


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

Not designated. Exposed in Mammoth mining camp area, 3 mi southwest of village of Mammoth. Mapped area almost entirely in W/2 sec. 26 and E/2 sec. 27, T. 8 S., R. 16 E., on east flank of Black Hills. Also exposed in area of village of Oracle on northern slope of Santa Catalina Mountains, Pinal Co., southeastern AZ. Named from village of Oracle (Peterson, 1938).


AAPG geologic province:

Southwestern Basin-and-Range region


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 ([ ]).