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National Geologic Map Database

NGMDB

Geologic Unit: Idavada

Usage:

Idavada Volcanics (ID*,NV*)
Idavada Group (ID)


Subunits:

GROUP STATUS (alphabetical): Beaverdam Formation (ID), Cottonwood Creek Rhyolite (ID), Cougar Point Formation (ID,NV), Jenny Creek Formation (ID,NV), Quarry View Park Rhyodacite (ID), Table Rock Road Rhyolite (ID).
FORMATION STATUS (alphabetical): Antelope Ridge tuff [member] (informal) (ID).


Geologic age:

Miocene*


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

Escarpment parallel to Salmon Falls Creek, 10 mi northwest of Idavada, Twin Falls Co., ID. Named from Idavada, a place on the railroad near U.S. Highway 93, at ID-NV State line (Malde and Powers, 1962).


AAPG geologic province:

Snake River basin*
Great Basin province*


NGMDB

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 ([ ]).

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Page Last Modified: Wed Jun 18 13:46:42 2014