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Oahe Formation- Windblown Silt

Obscurely bedded silt with paleosols; as thick as 6 meters (20 feet) where mapped. As much as 2 meters (7 feet) of windblown silt is present, but not mapped, on many level uplands southwest of the Missouri River, and less than 1 meter (3 feet) occurs at the surface throughout the state.
StateNorth Dakota
NameOahe Formation- Windblown Silt
Geologic agePhanerozoic | Cenozoic | Quaternary | Pleistocene Holocene
Original map labelQol
CommentsOahe Formation-Clay, sand, silt and gravel with dispersed organic materal
Primary rock typesilt
Secondary rock type
Other rock types
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Silt (Eolian)
Map references
Clayton, Lee, 1980, Geologic Map of North Dakota: U. S. Geological Survey, Scale 1:500K.
Unit references
Clayton, Lee, 1980, Geologic Map of North Dakota: U. S. Geological Survey, Scale 1:500K.
Geographic coverageBurleigh - Emmons - McKenzie - McLean - Mercer - Morton - Oliver

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