Shale, sandstone, volcanogenic clastic rocks, andesite, rhyolite, and locally thick carbonate units (NVJTRsv;0)

State	Nevada
Name	Shale, sandstone, volcanogenic clastic rocks, andesite, rhyolite, and locally thick carbonate units
Geologic age	Late Triassic to Early Cretaceous
Original map label	JTRsv
Comments	The Excelsior Formation makes up most of this unit in Mineral County; minimum thickness is 10,000 feet (Ross, 1961). Most of the Peavine Sequence is metamorphosed, though greenschist facies upto amphibolite facies near intrusive contacts (Bonham, 1969); most of this unit in Lyon, Douglas and Ormsby Counties is at least partially metamorphosed as well (Moore, 1969).
Primary rock type	rhyolite
Secondary rock type	andesite
Other rock types	dacite; trachyte; argillite; shale; sandstone; siltstone; carbonate; basalt
Lithologic constituents	Minor Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Carbonate > Limestone (Bed) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, ash-flow) Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Incidental Sedimentary > Clastic > Mudstone > Shale (Bed) Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, ash-flow) Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Felsic-volcanic > Dacite (Flow) Igneous > Volcanic > Felsic-volcanic > Trachyte (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Felsic-volcanic > Trachyte (Flow) Igneous > Volcanic > Felsic-volcanic > Trachyte (Pyroclastic, ash-flow) Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic, volcanic breccia)
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). Ross, D.C., 1961, Geology and Mineral Deposits of Mineral County, Nevada: Nevada Bureau of Mines and Geology Bulletin 58, 98 p., 2 pl. Bonham, H.F., 1969, Geology and Mineral Deposits of Washoe and Storey Counties, Nevada: Nevada Bureau of Mines and Geology Bulletin 70, 140 p., 6 pls. Moore, J.G., 1969, Geology and Mineral Deposits of Lyon, Douglas, and Ormsby Counties, Nevada: Nevada Bureau of Mines and Geology Bulletin 75, 45 p., 2 pl. Willden, R., and Speed, R.C., 1974, Geology and Mineral Deposits of Churchill County, Nevada: Nevada Bureau of Mines and Geology Bulletin 83, 95 p., 5 pl. Ludington, Steve, McKee, E.H., Cox, D.P., Moring, B.C., and Leonard,K.W., 1996, Pre-Tertiary geology of Nevada, in Singer, D.A., ed., An analysis of Nevada's metal-bearing mineral resources: Nevada Bureau of Mines and Geology Open-File Report 96-2, Chapter 4, p.4.1-4.17, 1 sheet, scale 1:1,000,000. (Also available at: www.nbmg.unr.edu/ofr962.)
Geographic coverage	Churchill - Douglas - Lyon - Mineral - Nye - Storey - Washoe - Carson City