Glacial debris; Late Pleistocene glacial till, outwash, and alluvium of continental glaciers; northern Idaho (IDQpt;0)

State	Idaho
Name	Glacial debris; Late Pleistocene glacial till, outwash, and alluvium of continental glaciers; northern Idaho
Geologic age	Late Pleistocene
Original map label	Qpt
Comments	Qpt includes glacial till and outwash from the Purcell Trench lobe of the Cordilleran Ice Sheet in northern Idaho, and from valley glaciers in mountain valleys of central and southern Idaho
Primary rock type	till
Secondary rock type	outwash
Other rock types	alluvium
Lithologic constituents	Major Unconsolidated > Coarse-detrital > Sand (Glacial)till and outwash Minor Unconsolidated > Coarse-detrital > Boulders (Glacial)till and outwash Unconsolidated > Coarse-detrital > Gravel (Glacial)till and outwash Incidental Unconsolidated > Fine-detrital (Alluvial)alluvial silt and mud Unconsolidated > Coarse-detrital (Alluvial)alluvial gravel and sand
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. Anonymous, undated, Glacial Lake Missoula and the channeled scabland, a digital portrait of landforms of the last ice age, Washington, Oregon, northern Idaho and western Montana: Missoula Montana, U.S. Forest Service, Geology Program, Digital Mapping, scale 1:1,000,000. Miller, F.K., Burmester, R.F., Miller, D.M., Powell, R.E., and Derkey, P.D., 1999, Digital geologic map of the Sandpoint 1o x 2o quadrangle, Washington, Idaho, and Montana: U.S. Geological Survey Open-File Report OF 99-144, scale 1:250,000 with report, 71 p. [http://pubs.er.usgs.gov/publication/ofr99144] 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. Rember, W.C. and Bennett, E.H., 1979, Geologic map of the Challis quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Challis 2o quadrangle, scale 1:250,000. Gaston, M.P. and Bennett, E.H., 1979, Geologic map of the Grangeville quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Grangeville 2o Quadrangle, scale 1:250,000
Geographic coverage	Ada - Blaine - Boise - Bonner - Bonneville - Boundary - Butte - Canyon - Cassia - Clark - Custer - Elmore - Fremont - Idaho - Lemhi - Twin Falls