USGS - science for a changing world

Mineral Resources On-Line Spatial Data

Mineral Resources > Online Spatial Data > Geology > by state > Washington

Younger glacial drift

Younger glacial drift, undivided. Till, outwash, and associated deposits; sorted and unsorted sand, gravel, silt, and clay. Includes some alluvium.
StateWashington
NameYounger glacial drift
Geologic agePleistocene
Original map labelQg1
CommentsIncludes nonglacial sediments and peat beds locally. Example: Whidbey Formation in Central Puget Lowland; peat beds in Vashon Stade. Principally Wisconsin in age. Difficult to distinguish from Qg2 by lithology; distinction is in age difference only. Some stratigraphic units may occur in both units, regardless of age.
Primary rock typetill
Secondary rock typeoutwash
Other rock typesalluvium; peat
Lithologic constituents
Minor
Unconsolidated > Fine-detrital > Clay (Glacial, till)
Unconsolidated > Fine-detrital > Silt (Glacial, till)
Unconsolidated > Coarse-detrital > Sand (Glacial, till)
Unconsolidated > Coarse-detrital > Gravel (Glacial, till)
Incidental
Unconsolidated (Alluvial)
Unconsolidated > Fine-detrital > Silt (Glacial, outwash)
Unconsolidated > Fine-detrital > Clay (Glacial, outwash)
Unconsolidated > Coarse-detrital > Sand (Glacial, outwash)
Unconsolidated > Coarse-detrital > Gravel (Glacial, outwash)
Unconsolidated > Peat
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.
Easterbrook, D. J., Crandell, D. R., Leopold, E. B., 1967, Pre-Olympia stratigraphy and chronology in the central Puget Lowland, Washington: Geological Society of America Bulletin, v. 78, no. 1, pp. 13-20.
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.
Geographic coverageBenton - Chelan - Clallam - Douglas - Grant - Grays Harbor - Island - Jefferson - King - Kitsap - Kittitas - Mason - Pierce - Skagit - Snohomish - Thurston - Whatcom

Show this information as [XML]

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoUSA.gov logoU.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=WAQg1;0
Page Contact Information: Peter Schweitzer