Usage:
Grass Valley Formation of Auld Lang Syne Group (NV*)
Geologic age:
Late Triassic (Norian)*
Type section, locality, area and/or origin of name:
Type locality: East slope of north end of East Range facing Grass Valley, in secs. 30, 31, and 32, T. 34 N., R. 37 E., and in secs. 24, 25, and 26, T. 34 N., R. 36 E., Rose Creek 15-min quadrangle, Pershing Co., north-central NV (Burke and Silberling, 1973).
Type area: mountain slope facing Grass Valley, northern part of East Range, Winnemucca quadrangle (Muller and others, 1951; Burke and Silberling, 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 ([ ]).