Dunlap Formation (NVJd;0)

State	Nevada
Name	Dunlap Formation
Geologic age	Early Jurassic to Middle Jurassic
Original map label	Jd
Comments	The thickness of the Dunlap Formation ranges from 3,000 to 5,000 feet thick.
Primary rock type	sandstone
Secondary rock type	conglomerate
Other rock types	volcanic rock (aphanitic); limestone; siltstone; shale
Lithologic constituents	Major Sedimentary > Clastic > Conglomerate (Bed)Upper part in Pilot Mountains and Garfield Hills derived almost entirely from underlying Luning limestone and dolomite (Ross, 1961). Conglomerate clasts in Esmeralda County are primarily chert pebbles (Albers and Stewart, 1972) Sedimentary > Clastic > Sandstone (Bed)Includes some tuffaceous sandstone. Minor Igneous > Volcanic > Mafic-volcanic (Flow)Includes greenstone, greenstone breccia, felsite, and tuff; probably close to major in rank. Incidental Sedimentary > Clastic > Mudstone > Shale (Bed)Reported in the Dunlap Formation in Esmeralda County (Albers and Stewart, 1972). Sedimentary > Clastic > Siltstone (Bed)Reported in the Dunlap and Dunlap(?) Formation in northern Nye County (Kleinhampl and Ziony, 1985). Sedimentary > Carbonate > Limestone (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). 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. 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. Ross, D.C., 1961, Geology and Mineral Deposits of Mineral County, Nevada: Nevada Bureau of Mines and Geology Bulletin 58, 98 p., 2 pl.
Geographic coverage	Esmeralda - Mineral - Nye