Roberts Mountains Formation (ID*,NV*,UT*)
Roberts Mountains Limestone (NV*-recognized locally in Mount Lewis area)
Silurian to Early Devonian*
Type section: on the west side of Roberts Creek Mountain [Roberts Creek Mountain 7.5-min quadrangle, Eureka Co.], NV (Merriam, 1940).
Snake River basin*
Great Basin province*
Idaho Mountains province
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.
"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).