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Driftless Area

This region is marked by a complex pattern of branching v-shaped valleys. These valleys were cut by streams over the last several million years, instead of by ice during the last 20,000 years, as in the rest of the state. This ancient landscape is called the Driftless Area because it has no glacial deposits, referred to as “drift.”

Driftless Area, photo by Louis Maher
© Louis Maher, from his "Geology by Light Plane" series.

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