Usage:
No current usage.
(†Hartford Hill Rhyolite Tuff (NV) replaced with (in ascending order) Mickey Pass Tuff, Lenihan Canyon Tuff, Nine Hill Tuff, Eureka Canyon Tuff, and Santiago Canyon Tuff. See Eureka Canyon, Lenihan Canyon, Mickey Pass, Nine Hill, and Santiago Canyon.)
Geologic age:
Tertiary (Oligocene to Miocene)
Type section, locality, area and/or origin of name:
Type locality: Hartford Hill, near Silver City, [Virginia Range, near Storey-Lyon Co. line], Virginia City 15-min quadrangle, western NV (Thompson, 1956).
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 ([ ]).