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Dolomite

DOLOMITE-Includes uppermost part of Ordovician System (Ely Springs Dolomite and equivalent rocks) and all of Silurian System.
State Nevada
Name Dolomite
Geologic age Late Ordovician to Late Silurian
Comments The Ely Springs Dolomite is included in White Pine County, parts of Elko County (Hose and Blake, 1976, Coats, 1987). Thickness of Ely Springs Dolomite and Laketown Dolomite in the Egan Range is 2,050 feet. Quartzite interbeds with the dolomite at the contact with the underlying Eureka Quartzite (see unit NVOc). There is one bed no more than 10 feet thick of quartizitic chert in the Laketown Dolomite (Hose and Blake, 1976). Locally includes some Sevy Dolomite in Elko County (see unit NVDc) (Coats, 1987).
Primary rock type dolostone (dolomite)
Secondary rock type chert
Other rock types quartzite
Lithologic constituents
Major
Sedimentary > Carbonate > Dolostone (Bed)Dolostone may be calcareous, shaly, or cherty.
Incidental
Metamorphic > Quartzite
Sedimentary > Chemical > Chert (Bed)
Map references
Stewart, J.H., and Carlson, J.E., 1978, Geologic Map of Nevada: U.S. Geological Survey and Nevada Bureau of Mines and Geology, 1:500,000 (not part of any formal series, printed and distributed by the U.S. Geological Survey, G75163, reprinted, 1981, G81386).
Unit references
Stewart, J.H., and Carlson, J.E., 1978, Geologic Map of Nevada: U.S. Geological Survey and Nevada Bureau of Mines and Geology, 1:500,000 (not part of any formal series, printed and distributed by the U.S. Geological Survey, G75163, reprinted, 1981, G81386).
Stewart, J. H., 1980, Geology of Nevada: A discussion to accompany the Geologic Map of Nevada: Nevada Bureau of Mines and Geology Special Publication 4.
Hose, R.K., and Blake, M.C, Jr., 1976, Geology, Pt. 1, in Geology and Mineral Resources of White Pine County, Nevada: Nevada Bureau of Mines and Geology Bulletin 85, p. 1-32, 2 pl.
Coats, R.R., 1987, Geology of Elko County, Nevada: Nevada Bureau of Mines and Geology Bulletin 101, 112 p., 1 pl.