Usage:
Combined Metals Member of Pioche Shale (NV*)
Geologic age:
Early Cambrian*
Type section, locality, area and/or origin of name:
Not designated. Named from Combined Metals Mine [in sec. 22, T. 1 N., R. 67 E., Pioche 7.5-min quadrangle], Lincoln Co., NV (Westgate and Knopf, 1932).
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 ([ ]).