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National Geologic Map Database

Geologic Unit: Chisholm

Usage:

Chisholm Formation (NV,UT)
Chisholm Shale (NV*,UT*)


Geologic age:

Middle Cambrian*


Type section, locality, area and/or origin of name:

Type locality: in vicinity of Chisholm Mine and Half Moon Gulch, 2 to 3 mi northwest of Pioche [Pioche 7.5-min quadrangle, Lincoln Co.], eastern NV (Walcott, 1916; see Deiss, 1938).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).