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The geology of Minnesota comprises the rock, minerals, and soils of the U.S. state of Minnesota, including their formation, development, distribution, and condition. The state's geologic history can be divided into three periods. The first period was a lengthy period of geologic instability from the origin of the planet until roughly 1,100 ...
43°30′N91°00′W43.5°N 91°W The Driftless Area, also known as Bluff Country and the Paleozoic Plateau, is a topographical 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 ...
Glacial history of Minnesota. Appearance. 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 ...
The Great Lakes tectonic zone (GLTZ) is bounded by South Dakota at its tip and heads northeast to south of Duluth, Minnesota, then heads east through northern Wisconsin, Marquette, Michigan, and then trends more northeasterly to skim the northernmost shores of lakes. Algoman orogeny added landmass to the Superior province by volcanic activity ...
Morton Gneiss. Morton gneiss, also known as rainbow gneiss, is an Archean -age gneiss found in the Minnesota River Valley of southwestern Minnesota, United States. It is one of the oldest stones on Earth, at about 3.5 billion years old. Along with the nearby Montevideo Gneiss, it is the oldest intact continental crust rock in the United States ...
The natural history of Minnesota covers the plant and animal species of the U.S. state of Minnesota. The continental climate and location of Minnesota at the physiographic intersection of the Laurentian and the Interior Plains influences its plant and animal life. Three of North America's biomes converge in Minnesota: prairie grasslands in the ...
Designated NMON. August 25, 1937. Pipestone National Monument is located in southwestern Minnesota, just north of the city of Pipestone, Minnesota. It is located along the highways of U.S. Route 75, Minnesota State Highway 23 and Minnesota State Highway 30. The quarries are culturally significant to 23 tribal nations of North America.
Dakota Formation (Nebraska) Show map of Nebraska. The Dakota is a sedimentary geologic unit name of formation and group rank in Midwestern North America. The Dakota units are generally composed of sandstones, mudstones, clays, and shales deposited in the Mid-Cretaceous opening of the Western Interior Seaway. [ 7 ]