Sandstone, conglomerate, siltstone, tuff, claystone, limestone, and diatomite; Pliocene tuffaceous alluvial and lacustrine deposits; Snake River Plain and vicinity, southeastern Idaho (IDTpd;0)

State	Idaho
Name	Sandstone, conglomerate, siltstone, tuff, claystone, limestone, and diatomite; Pliocene tuffaceous alluvial and lacustrine deposits; Snake River Plain and vicinity, southeastern Idaho
Geologic age	Pliocene
Original map label	Tpd; Tpv
Comments	Tpd represents semi-consolidated tuffaceous lacustrine and clastic alluvial sediments. In southeastern Idaho, lacustrine sediments of the upper (Pliocene) part of the Salt Lake Fm thinner and more widely distributed than those of its lower part. Pliocene sediments of the Idaho Gp were deposited in and around Pliocene Lake Idaho on the Snake River Plain.
Primary rock type	sandstone
Secondary rock type	conglomerate
Other rock types	siltstone; tuff; claystone; shale; limestone
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed)tuffaceous, poorly consolidated lacustrine and alluvial sandstone Minor Igneous > Volcanic (Pyroclastic, tuff)tuff, both mafic and felsic Sedimentary > Clastic > Siltstone (Bed)tuffaceous, poorly consolidated siltstone Sedimentary > Clastic > Conglomerate (Bed)poorly consolidated alluvial gravel to conglomerate Incidental Sedimentary > Chemical > Diatomite (Bed)impure diatomite Sedimentary > Carbonate > Limestone (Bed)lacustrine oolitic limestone Sedimentary > Clastic > Mudstone > Shale (Bed)lacustrine Sedimentary > Clastic > Mudstone > Claystone (Bed)lacustrine
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. Oriel, S.S., and Platt, L.B., 1980, Geologic map of the Preston 1o x 2o quadrangle, southeastern Idaho and western Wyoming: U.S. Geological Survey Miscellaneous Investigations Series, Map I-1127, scale 1:250,000. [http://pubs.er.usgs.gov/publication/i1127] Alt, David, and Hyndman, D.W., 1995, Northwest Exposures, a Geologic Story of the Northwest: Missoula Montana, Mountain Press Publishing Co., 443 p. 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 Dubois quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology Map Series, Dubois 2o quadrangle, scale 1:250,000. 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.
Geographic coverage	Ada - Bannock - Bear Lake - Benewah - Bingham - Boise - Bonneville - Canyon - Caribou - Cassia - Clark - Elmore - Franklin - Fremont - Gem - Gooding - Kootenai - Madison - Nez Perce - Oneida - Owyhee - Payette - Power - Shoshone - Washington