Welded and nonwelded silicic ash-flow tuffs (NVTt3;0)

State	Nevada
Name	Welded and nonwelded silicic ash-flow tuffs
Geologic age	Middle Miocene to Late Miocene
Original map label	Tt3
Comments	data from Best and others (1989) [IAVCEI]
Primary rock type	rhyolite
Secondary rock type
Other rock types
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, ash-flow) Minor Igneous > Volcanic > Alkalic-volcanic (Pyroclastic, ash-flow) Incidental Igneous > Volcanic > Alkalic-volcanic (Pyroclastic, air fall) Igneous > Volcanic > Alkalic-volcanic (Pyroclastic, tuff) Igneous > Volcanic > Felsic-volcanic > Trachyte (Pyroclastic, ash-flow) Igneous > Volcanic > Felsic-volcanic > Trachyte (Pyroclastic, air fall) Igneous > Volcanic > Felsic-volcanic > Trachyte (Pyroclastic, tuff) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, ash-flow) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, air fall) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, tuff) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, air fall) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, tuff)
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. Best, M.G., Christiansen, E.H., Deino, A. L., Gromm, C. S., McKee, E. H., and Noble, D. C., 1989, Excursion 3A-Eocene through Miocene volcanism in the Great Basin of the western United States, in Chapin, C.E., and Zidek, Jiri, eds., Field excursions to volcanic terranes in the western United States, Volume II-Cascades and intermountain west: New Mexico Bureau of Mines and Mineral Resources Memoir 47, p. 91-133.
Geographic coverage	Churchill - Clark - Elko - Esmeralda - Humboldt - Lincoln - Lyon - Mineral - Nye - Pershing - Washoe