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The Driftless Area, also known as Bluff Country and the Paleozoic Plateau, is a topographic and cultural region in the Midwestern United States [1] that comprises southwestern Wisconsin, southeastern Minnesota, northeastern Iowa, and the extreme northwestern corner of Illinois. The Driftless Area is a USDA Level III Ecoregion: Ecoregion 52.
The region is within the Driftless Area, a region noted for its karst topography, which includes caves and sinkholes. Tyson's cave is a solutional cave privately owned by the Minnesota Cave Preserve. It is known for the extinct ice-age bones found scattered throughout the cave rooms.
The park is in the Driftless Area of Iowa. This region escaped being glaciated in the last ice age, while regions to the east and west were not spared. The park has been subjected to hundreds of thousands of years of natural non-glacial erosion. [citation needed]
Northern Hemisphere glaciation during the last ice ages. The creation of 3 to 4 kilometres (1.9 to 2.5 mi) thick ice sheets caused a global sea level drop of about 120 m (390 ft) Diagram of glacial plucking and abrasion. The glacial history of Minnesota is most defined since the onset of the last glacial period, which ended some 10,000 years ago.
The park is in the Driftless Area of Wisconsin, a portion of territory that remained ice free during the last ice age, while land to the east and west was crushed by glaciers. The high bluffs along the Mississippi River and the large deep canyon of the Wisconsin River are evidence of glacial meltwaters reshaping this region.
Devil's Lake State Park is a state park located in the Baraboo Range in eastern Sauk County, just south of Baraboo, Wisconsin.It is around thirty-five miles northwest of Madison, and is on the western edge of the last ice-sheet deposited during the Wisconsin glaciation. [2]
Wisconsin's geography is diverse, shaped by Ice Age glaciers except in the Driftless Area. The Northern Highland and Western Upland along with a part of the Central Plain occupy the state's western part, with lowlands stretching to Lake Michigan. Wisconsin is third to Ontario and Michigan in the length of its Great Lakes coastline.
The Ice Age Trail is a National Scenic Trail stretching 1,200 miles (1,900 km) in the state of Wisconsin in the United States. [1] [2] The trail is administered by the National Park Service, [3] and is constructed and maintained by private and public agencies including the Ice Age Trail Alliance, a non-profit and member-volunteer based organization with local chapters. [4]