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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Combined Metals bed*
  • Modifications:
    • Named
  • AAPG geologic province:
    • Great Basin province
Publication:

Westgate, L.G., and Knopf, Adolph, 1932, Geology and ore deposits of the Pioche district, Nevada: U.S. Geological Survey Professional Paper, 171, 79 p., (incl. geologic map, scale 1:62,500)


Summary:

Unit is named the Combined Metals bed of the Pioche Shale. Age is Early Cambrian.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Combined Metals member*
  • Modifications:
    • Adopted
    • Biostratigraphic dating
  • AAPG geologic province:
    • Great Basin province
Publication:

Palmer, A.R., 1958, Morphology and ontogeny of a Lower Cambrian Ptychoparioid trilobite from Nevada: Journal of Paleontology, v. 32, no. 1, p. 154-170.


Summary:

Combined Metals bed (Westgate and Knopf, 1932) is adopted as the Combined Metals member of the Pioche Shale. Age is Early Cambrian based on fossils [trilobites].

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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 ([ ]).

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