Chainman Shale (CA*,NV*,UT*)
Chainman Formation (NV*)
(descending): Delle Phosphatic Member (NV*,UT*), Jensen Member (UT), Needle Siltstone Member (UT*), Scotty Wash Member (NV), Skunk Spring Limestone Bed (UT*), Willow Gap Member (UT).
Named from the Chainman Mine, near Lane, Ely quadrangle, White Pine Co., eastern NV (Spencer, 1917).
Type section: Robinson Canyon, 2 mi west of Ely, Egan Range, [Ely quadrangle, White Pine Co., eastern NV] (GNC index card files).
Great Basin 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 ([ ]).