Usage:
Grantsville Formation (NV*)
Geologic age:
Triassic, Late
Triassic, Middle*
Type section, locality, area and/or origin of name:
On crest of spur separating mouth of Union Canyon from next large canyon to the north. Named from mining camp on west flank of Shoshone Mountains in north-central part of Tonopah quadrangle, central NV. Outcrops also on ridge due north of Grantsville, at mouth of Grantsville Canyon, and on low isolated hill just south of Union Canyon (Muller and Ferguson, 1939).
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 ([ ]).