Andesite and related rocks of intermediate composition (NVTa1;0)

State	Nevada
Name	Andesite and related rocks of intermediate composition
Geologic age	Late Eocene to Middle Eocene
Original map label	Ta1
Primary rock type	andesite
Secondary rock type	latite
Other rock types
Lithologic constituents	Major Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Minor Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow) Incidental Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic, volcanic breccia) 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). 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 - Elko - Eureka - Humboldt - Lander - Nye - White Pine