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

Pleistocene till, moraines and similar unsorted glacial debris.
State Idaho
Name Glacial debris; Late Pleistocene glacial till, outwash, and alluvium of continental glaciers; northern Idaho
Geologic age Late Pleistocene
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 > Gravel (Glacial)till and outwash
Unconsolidated > Coarse-detrital > Boulders (Glacial)till and outwash
Incidental
Unconsolidated > Coarse-detrital (Alluvial)alluvial gravel and sand
Unconsolidated > Fine-detrital (Alluvial)alluvial silt and mud
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.
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
Counties Ada - Blaine - Boise - Bonner - Bonneville - Boundary - Butte - Canyon - Cassia - Clark - Custer - Elmore - Fremont - Idaho - Lemhi - Twin Falls