Usage:
Coal Valley Formation (NV*)
Coal Valley Formation of Wassuk Group (NV)
Geologic age:
late Tertiary (late Miocene)*
Type section, locality, area and/or origin of name:
Type section: from NE/4 NW/4 sec. 2 to NW/4 SE/4 sec. 1, T. 7 N., R. 27 E. [Ninemile Ranch 7.5-min quadrangle], Lyon Co., NV (Axelrod, 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 ([ ]).