Chert, shale, argillite, siltstone, quartzite, and greenstone (NVDCAsv;0)

State	Nevada
Name	Chert, shale, argillite, siltstone, quartzite, and greenstone
Geologic age	Cambrian to Devonian
Original map label	DCsv
Comments	Limited to Snake Mountains of Elko County where chert, orthoquartzite, and limestone in the north grade to chert conglomerate and siltstone in the south, relative amounts unreported (Coats, 1987). No greenstone mentioned. Maybe Valmy and Vinini Formations.
Primary rock type	chert
Secondary rock type	quartzite
Other rock types	limestone; siltstone; conglomerate; shale
Lithologic constituents	Major Sedimentary > Chemical > Chert (Bed) Metamorphic > Quartzite Minor Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Carbonate > Limestone (Bed) Incidental Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Clastic > Siltstone (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. Coats, R.R., 1987, Geology of Elko County, Nevada: Nevada Bureau of Mines and Geology Bulletin 101, 112 p., 1 pl.
Geographic coverage	Elko