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Topo

Ecoregions

Public Lands

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WEATHER

Illinois/Indiana Prairies

Ecoregion in IL, IN

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The Illinois/Indiana Prairies ecoregion is undulating and characterized by dark, very fertile soils. Today, corn, soybean, and livestock farming has replaced the original prairie and oak-hickory forest; woodland is largely confined to riparian areas. Low gradient, silt-bottomed streams have cut into the limy glacial and lacustrine deposits of Ecoregion 54a; they are warm in the summer, impacted by field runoff and channelization, and often carry a large amount of suspended sediment.

— EPA

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