Wyman Formation (NVZw;0)

State	Nevada
Name	Wyman Formation
Geologic age	Late Proterozoic
Original map label	Zw
Comments	Albers and Stewart, 1972, describe the Wyman Formation as primarily siltstone with thin limestone interbeds; the strata are somewhat metamorphosed and commonly grade to phyllite, schist, marble, and calc-silicate and siliceous hornfels. In Nevada, the Wyman Formation is 960-1350 feet thick, while in the White-Inyo Range, the Formation is 9,000+ feet thick; in neither location is the base exposed.
Primary rock type	siltstone
Secondary rock type	limestone
Other rock types	sandstone; dolostone (dolomite)
Lithologic constituents	Major Sedimentary > Clastic > Siltstone (Bed)Includes phyllitc siltstone, silty claystone, and limy siltstone. Minor Sedimentary > Carbonate > Limestone (Bed)Includes sandy limestone. Incidental Sedimentary > Carbonate > Dolostone (Bed) Sedimentary > Clastic > Sandstone (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. Albers, J.P., and Stewart, J.H., 1972, Geology and Mineral Deposits of Esmeralda County, Nevada: Nevada Bureau of Mines and Geology, 80 p., 2 pl.
Geographic coverage	Esmeralda - Nye