Rhyolite flows; Middle Pleistocene felsic volcanics of subunit 1f; eastern Snake River Plain and Yellowstone Plateau (IDQpm1f;0)

State	Idaho
Name	Rhyolite flows; Middle Pleistocene felsic volcanics of subunit 1f; eastern Snake River Plain and Yellowstone Plateau
Geologic age	Middle Pleistocene
Original map label	Qpm1f
Comments	Qpm1f corresponds to the Big Bend Ridge Rhyolite, above Huckleberry Ridge Tuff (2.0) and below Mesa Falls Tuff (1.2 Ma). Source vents probably are buried in the Island Park basin (ID123). Four flows of the Big Bend Ridge Rhyolite are post-collapse rhyolite flows of the first eruptive cycle of the Yellowstone Plateau volcanic field (ID123).
Primary rock type	rhyolite
Secondary rock type	lava flow
Other rock types
Lithologic constituents	Major Igneous > Volcanic > Felsic-volcanic > Rhyolite (Flow)Big Bend Ridge Rhyolite flows
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. Mitchell, V.E.., and Bennett, E.H., 1979, Geologic map of the Ashton quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Ashton 2o Quadrangle, scale 1:250,000. Christiansen, R.L., 1982, Late Cenozoic volcanism of the Island Park area, eastern Idaho: in Bonnichsen, Bill, and Breckenridge, R.M., eds., Cenozoic Geology of Idaho: Moscow, Idaho, IdahoBureau of Mines and Geology Bulletin 26, p. 345-368.
Geographic coverage	Fremont