Sheyenne National Grasslands
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	Dakota Prairie & Sheyenne Nat'l Grassland Vicinity Map
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Year - 2004 Scale - 1/2" to the Mile (1:126,720) Plastic The Sheyenne National Grasslands is just one part of the bigger Dakota National Grasslands. Glaciers covered this area some 10,000 years ago during the Wisconsin Ice Age. As the glaciers withdrew, they shaped the rollings hills and deposited great outwash sand plains. The Sheyenne National Grassland area is characterized by sandy soils, orignally deposited as a delta of an ancient river as it emptied into glacial Lake Agassiz. Since that time the wind and rains have shaped the sand into the topography you see today.