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Glacial 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 Great ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial 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 Great ... [...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 ... [...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, News & Information, YourClassical MPR and 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 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 equal 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 United States. MPR also produces and distributes national public radio programming via its subsidiary American Public Media, which is the second-largest producer of public radio programming in the United States, and largest producer and distributor of classical music programming. History Minnesota Public Radio began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Minnesota-Duluth
A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, the designation is reserved for colleges that have a graduate school. The word ''university'' is derived from the Latin ''universitas magistrorum et scholarium'', which roughly means "community of teachers and scholars". The first universities were created in Europe by Catholic Church monks. The University of Bologna (''Università di Bologna''), founded in 1088, is the first university in the sense of: *Being a high degree-awarding institute. *Having independence from the ecclesiastic schools, although conducted by both clergy and non-clergy. *Using the word ''universitas'' (which was coined at its foundation). *Issuing secular and non-secular degrees: grammar, rhetoric, logic, theology, canon law, notarial law.Hunt Janin: "The university in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nitrogen Fixation
Nitrogen fixation is a chemical process by which molecular nitrogen (), with a strong triple covalent bond, in the air is converted into ammonia () or related nitrogenous compounds, typically in soil or aquatic systems but also in industry. Atmospheric nitrogen is molecular dinitrogen, a relatively nonreactive molecule that is metabolically useless to all but a few microorganisms. Biological nitrogen fixation or ''diazotrophy'' is an important microbials mediated process that converts dinitrogen (N2) gas to ammonia (NH3) using the nitrogenase protein complex (Nif). Nitrogen fixation is essential to life because fixed inorganic nitrogen compounds are required for the biosynthesis of all nitrogen-containing organic compounds, such as amino acids and proteins, nucleoside triphosphates and nucleic acids. As part of the nitrogen cycle, it is essential for agriculture and the manufacture of fertilizer. It is also, indirectly, relevant to the manufacture of all nitrogen chemical c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficient carbon sink on the planet, because peatland plants capture carbon dioxide (CO2) naturally released from the peat, maintaining an equilibrium. In natural peatlands, the "annual rate of biomass production is greater than the rate of decomposition", but it takes "thousands of years for peatlands to develop the deposits of , which is the average depth of the boreal orthernpeatlands", which store around 415 gigatonnes (Gt) of carbon (about 46 times 2019 global CO2 emissions). Globally, peat stores up to 550 Gt of carbon, 42% of all soil carbon, which exceeds the carbon stored in all other vegetation types, including the world's forests, although it covers just 3% of the land's surface. ''Sphagnum'' moss, also called peat moss, is one of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aitkin, Minnesota
Aitkin ( ) is a city in Aitkin County, Minnesota, United States. The population was 2,168 at the 2020 census. It is the county seat of Aitkin County. 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 (or Ogibeway) at the mouth of the Ripple River. (Today the town here is known as Riverton.) 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grand Rapids, Minnesota
Grand Rapids is a city in Itasca County, Minnesota, United States, and it is the county seat. The population is 11,126 according to 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 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 located on the site. Old ... [...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. [...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 444 square miles, with a maximum depth of 35 feet. 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. That lake is a popular destination for ice fishing. In the early 2022 fishing season an incident occurred, involving around 200 people laying on the ice sheet on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Of The Woods
Lake of the Woods (french: Lac des Bois, oj, Pikwedina Sagainan) 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 ... [...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, at the confluence of its main tributary, the Missouri River. 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 smoothed out or covered over by previous geological processes. Inasmuch as the Wisconsin glaciation formed lobes that met (and blocked) wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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