Holocene to middle Pliocene volcanic rocks (AZQTv;0)

State	Arizona
Name	Holocene to middle Pliocene volcanic rocks
Geologic age	Middle Pliocene to Holocene
Original map label	QTv
Comments	San Francisco volcanic field only
Primary rock type	andesite
Secondary rock type	dacite
Other rock types	alkali rhyolite; rhyolite; alkaline basalt; basalt
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow) Igneous > Volcanic > Felsic-volcanic > Dacite (Flow) Igneous > Volcanic > Mafic-volcanic > Andesite (Flow) Incidental Igneous > Volcanic > Alkalic-volcanic (Stock or pipe)alkali basalt Igneous > Volcanic > Alkalic-volcanic (Dike or sill)alkali basalt Igneous > Volcanic > Alkalic-volcanic (Volcaniclastic)alkali basalt Igneous > Volcanic > Alkalic-volcanic (Pyroclastic)alkali basalt Igneous > Volcanic > Alkalic-volcanic (Flow)alkali basalt Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Stock or pipe) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dome) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-rhyolite (Dike or sill) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Stock or pipe) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dome) Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-dacite (Dike or sill) Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Stock or pipe) Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-andesite (Dike or sill) Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basaltic-andesite (Stock or pipe) Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basaltic-andesite (Dike or sill) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Volcaniclastic) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic) Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic) Igneous > Volcanic > Mafic-volcanic > Andesite (Volcaniclastic) Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Pyroclastic) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow)
Map references	Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000.
Unit references	Richard, S. M., Reynolds, S.J., Spencer, J. E., and Pearthree, P. A., 2000, Geologic Map of Arizona: Arizona Geological Survey Map 35, 1 sheet, scale 1:1,000,000. Lynch, D.J., Neogene volcanism in Arizona: the recognzable volcanoes, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Digest 17, p. 681-700. Nealey, L.D., and Sheridan, M.F., 1989, Post-Laramide volcanic rocks of Arizona and northern Sonora, Mexico, and their inclusions, in Jenney, J.P., and Reynolds, S.J., editors, Geologic evolution of Arizona: Arizona Geological Society Diges
Geographic coverage	Coconino