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*
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 ([ ]).