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National Geologic Map Database

Geologic Unit: Theodore

Usage:

Theodore Quartz Diorite (NV*)


Geologic age:

Jurassic*


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

Excellent exposures surrounding Theodore Basin, T. 44 N., R. 29 E., Pine Forest Range, Duffer Peak 15-min quadrangle, Humboldt Co., NV. Named from Theodore Basin (Smith, 1973).


AAPG geologic province:

Great Basin 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 ([ ]).