Younger glacial drift (WAQg1o;0)

State	Washington
Name	Younger glacial drift
Geologic age	Pleistocene
Original map label	Qg1o
Comments	Principally Wisconsin in age. Includes outburst flood deposits from glacial Lake Missoula in the Channeled Scablands.
Primary rock type	outwash
Secondary rock type	stratified drift
Other rock types	alluvium
Lithologic constituents	Minor Unconsolidated > Coarse-detrital > Gravel (Glacial, esker) Unconsolidated > Fine-detrital > Silt (Glacial, outwash) Unconsolidated > Coarse-detrital > Sand (Glacial, outwash) Unconsolidated > Coarse-detrital > Gravel (Glacial, outwash) Incidental Unconsolidated (Alluvial) Unconsolidated > Coarse-detrital > Sand (Glacial, esker) Unconsolidated > Fine-detrital > Clay (Glacial, outwash)
Map references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.
Unit references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000. Easterbrook, D. J., 1976a, Quaternary Geology of the Pacific Northwest, in Mahaney, W.C., ed., Quaternary Stratigraphy of North America: Stroudsberg, PA, Dowden, Hutchinson and Ross, p. 441-462. Schuster, J. E., 1994, Geologic Map of the Walla Walla 1:100,000 quadrangle, Washington: Washingtone State Division of Geology and Earth Resources Open-File Report 94-3, 18 p. Schuster, J. E., Gulick, C.W., Reidel, S. P., Fecht, K. R., Zurenko, S., 1997, Geologic Map of Washington--Southeast Quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-45, scale 1:250,000. Bretz, J. H., 1923, The Channeled Scablands of the Columbia Plateau: The Journal of Geology, v. 31, no. 8, p. 617-649. Stoffel, K. L., Joseph, N. L., Waggoner, S. Z., Gulick, C. W., Korosec, M. A., Bunning, B. B., 1991, Geologic Map of Washington--Northeast Quadrant: Washington Division of Geology and Earth Resources Geologic Map, GM-39, scale 1:250,000. Jones, M. A., 1999, Geologic Framework for the Puget Sound Aquifer System, Washington and British Columbia: U. S. Geological Survey Professional Paper 1424-C, 31 p., 18 pls. [http://pubs.er.usgs.gov/publication/pp1424C]
Geographic coverage	Adams - Benton - Columbia - Douglas - Franklin - Grant - King - Kitsap - Kittitas - Lewis - Lincoln - Mason - Pierce - Skagit - Snohomish - Spokane - Thurston - Walla Walla - Whatcom - Whitman