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Mineral Resources On-Line Spatial Data

Dolomite, limestone, and minor amounts of sandstone and quartzite

DOLOMITE, LIMESTONE, AND MINOR AMOUNTS OF SANDSTONE AND QUARTZITE-Includes units such as Sevy and Simonson Dolomites, Guilmette and Nevada Formations, and Devils Gate Limestone.
StateNevada
NameDolomite, limestone, and minor amounts of sandstone and quartzite
Geologic ageDevonian
Original map labelDc
CommentsThe Nevada Formation has been divided into other formations by some geologists and the term is now considered obsolete by the U.S. Geological Survey (Coats, 1987). Other geologists consider the Nevada Formation to be equivalent to the Sevy Dolomite and the Simonson Dolomite (Hose and Blake, 1976) and Guilmette Formation (Kleinhampl and Ziony, 1985). About 65-75% of the Simonson is dolomite while the remaining portion is orthoquartzite and limestone; the thickness ranges from 500 to 1800 feet. The Guilmette is almost 70% limestone while the remaining portion is mostly dolostone; the thickness is 1050-2500 feet thick. The Sevy Formation is 1,300 feet thick and primarily dolostone with some cherty beds and some sandstone (Coats, 1987, Hose and Blake, 1976). In Eureka, the Devonian strata (Rabbit Hill Limestone, Nevada Formation, Devil's Gate Limestone, and Pilot Shale) is primarily limestone with lesser dolomite, shale, and sandstone. Note that the proportions of dolostone to limestone in the Nevada Formation vary east to west (Roberts and others, 1967). The proportions of dolostone to limestone in the Guilmette Formation appear to vary geographically as well with increasing limestone westward and increasing dolostone east and southward (Kleinhampl and Ziony, 1985). The Sultan and Muddy Peak Limestone occur in Clark County of which the upper part is mostly limestone and the lower is mostly dolostone (Longwell and others, 1965).
Primary rock typedolostone (dolomite)
Secondary rock typelimestone
Other rock typessandstone; quartzite; conglomerate; shale; chert
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Incidental
Sedimentary > Chemical > Chert (Lense)
Sedimentary > Clastic > Mudstone > Shale (Bed)Limited to outcrops of the Pilot Shale included in this unit in Eureka County.
Sedimentary > Clastic > Conglomerate (Bed)Occurs as a basal bed of the Simonson Dolomite.
Sedimentary > Clastic > Sandstone (Bed)Prominant lithology that makes up only a small fraction of the whole unit. Also, much of the dolomite and limestone, especially adjacent to sandstone beds or interbeds is silty and sandy.
Metamorphic > Quartzite
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.
Longwell, C.R., Pampeyaan, E.H., Bowyer, B., and Roberts, R.J., 1965, Geology and Mineral Deposits of Clark County, Nevada: Nevada Bureau of Mines and Geology Bulletin 62, 218 p., 16 pl.
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.
Roberts, R.J., Montgomery, K.M., and Lehner, R.E., 1967, Geology and Mineral Resources of Eureka County, Nevada: Nevada Bureau of Mines and Geology Bulletin 64, 152 p., 12 pl.
Tschanz, C.M., and Pampeyan, E.H., 1970, Geology and Mineral Deposits of Lincoln County, Nevada: Nevada Bureau of Mines Bulletin 73, 187 p., 7 pl.
Kleinhampl, F.J., and Ziony, J.I., 1985, Geology of Northern Nye County, Nevada: Nevada Bureau of Mines and Geology Bulletin 99A, 172 p., 2 pl.
Geographic coverageClark - Elko - Eureka - Lander - Lincoln - Nye - White Pine

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