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The Driftless Area comprises southwestern Wisconsin, southeastern Minnesota, northeastern Iowa, and the extreme northwestern corner of Illinois in the American Midwest. It was never covered by ice during the last ice age, and therefore lacks glacial deposits, also termed drift. Its landscape is characterized by steep hills, forested ridges, deeply carved river valleys, and karst geology with spring-fed waterfalls and cold-water trout streams. Ecologically, the Driftless Area's flora and fauna are more closely related to those of the Great Lakes region and New England than those of the broader Midwest and central Plains regions. The steep riverine landscape of both the Driftless Area proper and the surrounding Driftless-like region are the result of early glacial advances that forced preglacial rivers that flowed into the Great Lakes southward, causing them to carve a gorge across bedrock cuestas, thereby forming the modern incised upper Mississippi River valley. The region has elevations ranging from 603 to 1,719 feet (184 to 524 m) at Blue Mound State Park, and together with the Driftless-like region, covers 24,000 square miles (62,200 km2).
State of Wisconsin
Wisconsin is a state in the upper Midwestern United States, bordered by Minnesota to the west; Iowa to the southwest; Illinois to the south; Lake Michigan to the east; Michigan to the northeast; and Lake Superior to the north.
Ripon is a city in Fond du Lac County, Wisconsin, United States. The population was 7,733 at the 2010 census. The city is surrounded by the Town of Ripon.
Green Lake Country
Green Lake — also known as Big Green Lake (to distinguish it from Little Green Lake, which is near Markesan)— is a lake in Green Lake County, Wisconsin, United States. Green Lake has a maximum depth of 237 ft (72 m), making it the deepest natural inland lake in Wisconsin and the second largest by volume. The lake covers 29.72 km2 (7,340 acres) and has an average depth of 30.48 m (100.0 ft). Green Lake has 43.94 km (27.30 mi) of diverse shoreline, ranging from sandstone bluffs to marshes.