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Tewaukon/Big Stone Stagnation Moraine
Ecoregion
in
ND
,
MN
,
SD
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In Minnesota this ecoregion is a transition from the Red River Valley to the Minnesota River Valley and from the Red River Lobe to the Des Moines Lobe of Wisconsin glaciation. There are many lakes including the long Lake Traverse at the head (south end) of the Red River drainage and the long Big Stone Lake at the head of the Minnesota River, both lakes forming the boundary between South Dakota and Minnesota. The topography is gently undulating and rolling with corn and soybean agriculture throughout the ecoregion except for some wetlands in the southern part of the region near the reservoirs and wetlands along the Minnesota River, and in the southeastern part of the region in former Glacial Lake Benson. There is a ridge of slightly higher elevations running east-west through the ecoregion on top of which and south of which is an area of clayey Udert soils that correlate with alternating till plain and drift complex with rolling topography and some steep slopes. About 70% of this ecoregion was corn and soybeans in 2013, and almost 15% wetlands.
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