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The geology of Wisconsin includes Precambrian crystalline basement rock over three billion years old. A widespread marine environment during the Paleozoic flooded the region, depositing sedimentary rocks which cover most of the center and south of the state. [1]
Roadside Geology of Wisconsin [2] Glacial Lake Wisconsin 20,000 years ago with modern counties for geographical context. Glacial Lake Wisconsin was a prehistoric proglacial lake that existed from approximately 18,000 to 14,000 years ago, at the end of the last ice age , in the central part of present-day Wisconsin in the United States .
The Yellow River in north central Wisconsin is a tributary of the Chippewa River.For the most part it is a mud and rock-bottomed river flowing through forest and farmland. It is one of four distinct rivers in the state bearing the name Yellow Riv
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Wisconsin is bordered by Lake Superior in the north and Lake Michigan in the east. [37] The state has over 15,000 named lakes, totaling about 1 million acres (4,000 km 2). Within Wisconsin, Lakes Superior and Michigan total 6.4 million acres (26,000 km 2). [38] Along the two great lakes, Wisconsin has over 500 miles (800 km) of shoreline. [39]
Over several years the company evolved into an independent publishing company and eventually a distributor for other publishers. The company's largest and most popular series of books is Roadside Geology with 29 titles and sales of over 1 million total copies. Other popular series include Geology Underfoot (7 titles) and Roadside History (18 ...
Where the Wisconsin River turns west to join the Mississippi, the area to the south, including the whole of Grant County as well as most of Lafayette County, are part of the Driftless Area. The rugged terrain comprising most of the Driftless Area is distinct from the rest of Wisconsin, and is known locally as the Coulee Region. The steep ridges ...
In volume two, page 214, Keating wrote of western Wisconsin, "To this region the name of the Wisconsin Hills has been given, which are terminated on the south by the Ocooch and Smoky Mountains, whose altitude is about twelve hundred feet above the common level, or two thousand feet above tide water.