Dune sand and loess

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
Unconsolidated (Eolian-loess)
Unconsolidated > Coarse-detrital > Sand (Eolian-loess)
NGMDB product
Counties Albany - Carbon - Converse - Fremont - Goshen - Lincoln - Natrona - Platte - Sublette - Sweetwater - Uinta