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Dune sand and loess

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Includes active and dormant sand dunes. In northwestern Wyoming is chiefly loess (age 12,000-19,000 years).
State Wyoming
Name Dune sand and loess
Geologic age Pleistocene-Holocene
Lithologic constituents
Major
Unconsolidated (Eolian-loess)
Unconsolidated > Coarse-detrital > Sand (Eolian-loess)
References

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.

https://pubs.er.usgs.gov/publication/70046739
NGMDB product
Counties Albany - Carbon - Converse - Fremont - Goshen - Lincoln - Natrona - Platte - Sublette - Sweetwater - Uinta