Usage:
Shwin Formation (NV*)
Geologic age:
Middle Cambrian*
Type section, locality, area and/or origin of name:
Well exposed on and east of Shwin Ranch, from which formation is named, on south slope of the ridge between Goat Canyon and the North Fork of Mill Creek, northern Shoshone Range, [Mount Lewis 15-min quadrangle, Lander Co., northern NV] (Gilluly and Gates, 1965).
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 ([ ]).