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Proglacial Lakes Of Minnesota
The proglacial lakes of Minnesota were lakes created in what is now the U.S. state of Minnesota in central North America in the waning years of the last glacial period. As the Laurentide Ice Sheet decayed at the end of the Wisconsin glaciation, lakes were created in depressions or behind moraines left by the glaciers. Evidence for these lakes is provided by low relief topography and glaciolacustrine sedimentary deposits. Not all contemporaneous, these glacial lakes drained after the retreat of the lobes of the ice sheets that blocked their outlets, or whose meltwaters fed them. There were a number of large lakes, one of which, Glacial Lake Agassiz, was the largest body of freshwater known to have existed on the North American continent; there were also dozens of smaller and more transitory lakes filled from glacial meltwater, which shrank or dried as the ice sheet retreated north. Glacial Lake Agassiz Glacial Lake Agassiz was an enormous lake, larger in area than all the Grea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainy River (Minnesota-Ontario)
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Rainy River can refer to: * Rainy River (British Columbia), a short river that flows into the Howe Sound * Rainy River (Marlborough), a tributary of the Pelorus River, Marlborough District, New Zealand * Rainy River (Michigan), tributary of the Black River * Rainy River (Minnesota–Ontario), part of the United States-Canada border between Minnesota and Ontario * Rainy River (Tasman), a river in the Motueka River catchment, Tasman District, New Zealand * Rainy River, Ontario * Rainy River First Nations, an Ojibway First nation in Northwest Ontario * Rainy River District Rainy River District is a district and census division in Northwestern Ontario in the Canadian province of Ontario. It was created in 1885. It is the only division in Ontario that lies completely in the Central Time Zone, except for the township o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minnesota Public Radio
Minnesota Public Radio (MPR) is a public radio network for the state of Minnesota. With its three services, KNOW-FM, News & Information, KSJN, YourClassical MPR and KCMP, The Current, MPR operates a 46-station regional radio network in the upper Midwest. MPR has won more than 875 journalism awards, including the Peabody Award, both the RTNDA Edward R. Murrow Award and the Edward R. Murrow Award (CPB), Corporation for Public Broadcasting award of the same name, and the Alfred I. duPont-Columbia University Gold Baton Award. As of September 2011, MPR was tied with WNYC for most listener support for a public radio network, and had the highest level of recurring monthly donors of any public radio network in the nation. MPR also produces and distributes national public radio programming via American Public Media. History Minnesota Public Radio began on January 22, 1967, when KSJR-FM first signed on from the campus of College of Saint Benedict/Saint John's University, Saint John's U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Minnesota-Duluth
The University of Minnesota Duluth (UMD) is a public university in Duluth, Minnesota, United States. It is part of the University of Minnesota System. UMD offers 17 bachelor's degrees in 87 majors, graduate programs in 24 different fields, a two-year program at the School of Medicine, and a four-year College of Pharmacy program.The Will and the Way, published by Manley Goldfine and Donn Larson, 2004, chapter 30 by Mike Lalich. History Early history and plans for Duluth Normal School Although the University of Minnesota Duluth did not officially make its appearance until 1947, plans for a college in the Duluth area were first made in the 1890s. The state legislature planned for a teaching school for women (then referred to as a normal school) and in 1895 they passed a bill authorizing the "State Normal School at Duluth". In 1896, the City of Duluth donated of land to serve as a foundation for the school, and the state legislature provided additional funds for the constructio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Fixation
Nitrogen fixation is a chemical process by which molecular dinitrogen () is converted into ammonia (). It occurs both biologically and abiological nitrogen fixation, abiologically in chemical industry, chemical industries. Biological nitrogen fixation or ''diazotrophy'' is catalyzed by enzymes called nitrogenases. These enzyme complexes are encoded by the Nif gene, ''Nif'' genes (or ''Nif'' homologs) and contain iron, often with a second metal (usually molybdenum, but sometimes vanadium). Some nitrogen-fixing bacteria have symbiotic relationships with plants, especially legumes, mosses and aquatic ferns such as ''Azolla''. Looser non-symbiotic relationships between diazotrophs and plants are often referred to as associative, as seen in nitrogen fixation on rice roots. Nitrogen fixation occurs between some termites and fungus, fungi. It occurs naturally in the air by means of NOx, NOx production by lightning. Fixed nitrogen is essential to life on Earth. Organic compounds such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most common components in peat, although many other plants can contribute. The biological features of sphagnum mosses act to create a habitat aiding peat formation, a phenomenon termed 'habitat manipulation'. Soils consisting primarily of peat are known as histosols. Peat forms in wetland conditions, where flooding or stagnant water obstructs the flow of oxygen from the atmosphere, slowing the rate of decomposition. Peat properties such as organic matter content and saturated hydraulic conductivity can exhibit high spatial heterogeneity. Peatlands, particularly bogs, are the primary source of peat; although less common, other wetlands, including fens, pocosins and peat swamp forests, also deposit peat. Landscapes covered in peat are home to sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aitkin, Minnesota
Aitkin ( ) is a city and the county seat of Aitkin County, Minnesota, United States. The population was 2,168 at the 2020 census. History Before the establishment of City of Aitkin, a transient community of Lexington was located at the mouth of the Ripple River, at its confluence with the Mississippi River. However, maps from the 1860s erroneously depict the village of Ojibway at the mouth of the Ripple River. Due to the importance of regional trade at Lexington, the route of the Northern Pacific Railroad was planned to pass near there. Aitkin was founded in 1870 when the Northern Pacific Railroad was extended to that point, replacing and annexing Lexington. The city and county were named for William Alexander Aitken, a partner of the American Fur Company and chief factor of the company's regional operations in the early 19th century. The development of industries attracted people to the town. In the late 19th and early 20th century, a massive wave of immigrants, mostly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Rapids, Minnesota
Grand Rapids is a city in, and the county seat of, Itasca County, Minnesota, United States. The population was 11,126 at the 2020 census. The city is named for the long rapids in the Mississippi River which was the uppermost limit of practical steamboat travel during the late 19th century. Today the rapids are hidden below the dam of UPM Paper Company. History Grand Rapids became a logging town, as the Mississippi River provided an optimal method of log shipment to population centers. Blandin Paper Mill opened in 1902. The Forest History Center, located in Grand Rapids, MN, is a State Historic Site and a living history museum that recreates life as it was in a turn of the 20th century logging camp. Costumed interpreters guide visitors through a recreated circa 1890s logging camp to educate the public on the history of white pine logging and its relevance to today's economy. Miles of nature trails, educational naturalist programming, and an interpretive museum are also loc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Lake Duluth
Lake Duluth was a proglacial lake that formed in the Lake Superior drainage basin as the Laurentide Ice Sheet retreated."Post-Valders Lake Stages in the Lake Superior Basin" , i by N. King Huber, USGS Geological Survey Professional Paper 754-A The oldest existing shorelines were formed after retreat from the Greatlakean advance (previously called the Valders), sometime around 11,000 years B.P. Lake Duluth formed at the western end of the Lake Superior basin. Lake Duluth overflowed south through outlets in Minnesota and Wisconsin at an elevation of around 331 m above sea level. Predecessor lakes As th ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Lake (Minnesota)
Red Lake (translated from the Ojibwe language ''Miskwaagamiiwi-zaaga'igan'': Lake with its liquid aterbe colored red) is a lake in Beltrami County in northern Minnesota. It is the largest natural freshwater lake located entirely within Minnesota, and the 16th largest lake in the United States. The lake is separated into two sections by a peninsula on the eastern side that almost bisects it in the middle. The community of Ponemah lies on the peninsula. The two parts of the lake are known as Upper Red Lake and Lower Red Lake. Lower Red Lake lies entirely within the Red Lake Indian Reservation. Total size is , with a maximum depth of in the lower portion of the lake. The elevation of the lake is maintained by a dam at the outflow that is the beginning of Red Lake River, this being at the middle, western edge of Lower Red Lake. The lake is a popular destination for ice fishing. In the early 2022 fishing season an incident occurred, involving around 200 people laying on the i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Of The Woods
Lake of the Woods (; ) is a lake occupying parts of the Canadian provinces of Ontario and Manitoba and the U.S. state of Minnesota. Lake of the Woods is over long and wide, containing more than 14,552 islands and of shoreline. It is fed by the Rainy River, Shoal Lake, Kakagi Lake and other smaller rivers. The lake drains into the Winnipeg River and then into Lake Winnipeg. Ultimately, its outflow goes north through the Nelson River to Hudson Bay. Lake of the Woods is also the sixth largest freshwater lake located (at least partially) in the United States, after the five Great Lakes, and the 36th largest lake in the world by area. It separates a small land area of Minnesota from the rest of the United States. The Northwest Angle and the town of Angle Township can be reached from the rest of Minnesota only by crossing the lake or by traveling through Canada. The Northwest Angle is the northernmost part of the contiguous United States. Its " northwesternmost point" serve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Mississippi River
The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, a city at the confluence of its main tributary, the Missouri River. Historically, it may refer to the area above the Arkansas Post, above the confluence of Ohio River, or above Cape Girardeau. History In terms of geologic and hydrographic history, the Upper Mississippi east and south of Fort Snelling is a portion of the now-extinct Glacial River Warren which carved the valley of the Minnesota River, permitting the immense Glacial Lake Agassiz to join the world's oceans at the Gulf of Mexico. The collapse of ice dams holding back Glacial Lake Duluth and Glacial Lake Grantsburg carved out the Dalles of the St. Croix River at Interstate Park. The Upper Mississippi River valley likely originated as an ice-marginal stream during the Pre-Illinoian Stage. The Driftless Area is a portion of North America left unglaciated at that ice age's height, hence not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
