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National Geologic Map Database

Geologic Unit: Arrastra

Usage:

Arrastra volcanics (informal) (AZ)

Informal. The rank or lithologic term should not be capitalized.


Geologic age:

early Tertiary (Eocene to Oligocene?)


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

Notable exposures in Anderson Mine area, on south side Santa Maria River, in sec. 2, and secs. 9 through 16, T. 11 N., R. 10 W., southwest Yavapai Co., AZ. Origin of name not stated by authors (Sherborne and others, 1979).


AAPG geologic province:

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 ([ ]).