Usage:
Mason Valley Limestone (NV*)
Geologic age:
Late Triassic (Norian)*
Type section, locality, area and/or origin of name:
Type locality: exposures to west and southwest of the Mason Valley Mine, on north side of McConnell Canyon, in sec. 31, T. 13 N., R. 25 E., Yerington 7.5-min quadrangle [1986 prov. ed.], Yerington region, Singatse Range, Lyon Co., west-central NV. [Named from the mine] (Proffett and Dilles, 2008).
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 ([ ]).