Chisholm Shale |
| Usage of Geologic Unit Name: Chisholm Formation (NV,UT) Chisholm Shale (NV*,UT*) |
| Cambrian, Middle* |
| Great Basin province* |
| NV(ec)* UT(wc)* |
| Type Locality: Vicinity of Chisholm Mine and Half Moon Gulch, 2 to 3 mi northwest of Pioche [Pioche 7.5' quad], Lincoln Co., NV (Walcott, 1916). |
| Unit Name History: Named as Chisholm Shale; Biostratigraphic dating (Walcott, 1916). Adopted (Westgate and Knopf, 1932). Revised; Redescribed as Chisholm Formation; Areal limits (Hintze, 1980). |
|
Walcott, C.D., 1916, Cambrian geology and paleontology, III; No. 5, Cambrian trilobites: Smithsonian Miscellaneous Collections, v. 64, p. 303-456. 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). Hintze, L.F., 1980, Preliminary geologic map of the Sand Pass quadrangle, Juab and Millard Counties, Utah: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1151, 1 sheet, scale 1:24,000 |
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* show accepted USGS usage. Note that data on this page is modified from information
available via the
National Geologic Map Database GEOLEX: http://ngmdb.usgs.gov/Geolex/geolex_qs.html.
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