Rhyolite, quartz latite, and latite ignimbrites and flows; Miocene felsic volcanics; Owyhee Plateau; (IDTmf;0)

State	Idaho
Name	Rhyolite, quartz latite, and latite ignimbrites and flows; Miocene felsic volcanics; Owyhee Plateau;
Geologic age	Miocene
Original map label	Tmf; Tm?b; Tpf; Tpv
Comments	Tmf in Owyhee County (ID112, ID127) includes Rhyolites of the Silver City Range (15.6-16 Ma), Rhyolite of Black Mtn (15.7 Ma), Tuff of Swisher Ridge (13.1-13.8 Ma), lower flows of Juniper Mtn (13.8 Ma), upper flows of Juniper Mtn (11.7 Ma), Jump Cr Rhyolite (10.9 Ma), Tuff of Browns Cr (10.7-11.1 Ma), and Tuff of Little Jacks Creek (9.4-9.7 Ma). Youngest unit in Idavada Volcanics is Tuffs of the Goose Crek area (8.4-8.5 Ma), (ID099).
Primary rock type	rhyolite
Secondary rock type	latite
Other rock types	quartz latite; ignimbrite; lava flow
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic, ash-flow)welded rhyolite ash-flow tuff Minor Igneous > Volcanic > Felsic-volcanic > Latite (Flow)silicic latite lava flows (andesine, cpx, opx, phenos, rhyo matrix) Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow)rhyolitic lava flows (quartz, alkali feldspar phenos) Igneous > Volcanic > Felsic-volcanic > Latite (Pyroclastic, ash-flow)welded silicic latite ash-flow tuff Incidental Igneous > Volcanic > Felsic-volcanic > Quartz-latite (Pyroclastic)quartz latitic remobilized ash-flow tuff (qtz, plag, px phenos)
Map references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Unit references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000. Malde, H.E. and Powers, H.A., 1962, Upper Cenozoic stratigraphy of western Snake River Plain, Idaho: Geological Society of America Bulletin, v. 73, no. 10, p. 1197-1220. Rember, W.C., and Bennett, E.H., 1979, Geologic map of the Twin Falls quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Twin Falls 2o quadrangle, scale 1:250,000. Rember, W.C. and Bennett, Earl H., 1979, Geologic map of the Hailey quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Hailey 2o quadrangle, scale 1:250,000. Armstrong, R.L., Leeman, W.P., and Malde, H.E., 1975, K-Ar dating, Quaternary and Neogene volcanic rocks of the Snake River Plain, Idaho: American Journal of Science, v. 275, p. 225-251. Mitchell, V.E., and Bennett, E.H., 1979, Geologic map of the Boise quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Boise 2o Quadrangle, scale 1:250,000. Idaho Bureau of Mines and Geology, undated, Geology of the Jordan Valley quadrangle, Oregon-Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, scale 1:250,000. Ekren, E.B., McIntyre, D.H., Bennett, E.H., and Malde, H.E., 1981, Geologic map of Owyhee County, Idaho, west of longitude 116o W.: U.S. Geological Survey Miscellaneous Investigations Series, Map I-1256, 1:125,000 scale. [http://pubs.er.usgs.gov/publication/i1256]
Geographic coverage	Blaine - Camas - Cassia - Elmore - Gooding - Lincoln - Owyhee - Twin Falls