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The Great Lakes (French: Grands Lacs), also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the east-central interior of North America that connect to the Atlantic Ocean via the Saint Lawrence River.
Great Lakes è una compagnia del gruppo Munich Re, uno dei maggiori gruppi di assicurazioni e riassicurazioni del mondo. Nel 2017 abbiamo trasferito la nostra sede legale e direzione generale da Londra a Monaco di Baviera, per garantire un servizio migliore alle nostre business unit.
- Overview
- Geology
The Great Lakes are a chain of deep freshwater lakes in east-central North America comprising the lakes Superior, Michigan, Huron, Erie, and Ontario.
How were the Great Lakes of North America formed?
The present configuration of the Great Lakes basin is the result of the movement of massive glaciers through North America, a process that began about one million years ago during the Pleistocene Epoch. The glaciers undoubtedly scoured existing valleys, widening and deepening them and radically changing the drainage of the area.
Which of the Great Lakes is the largest?
Lake Superior is the largest of the five Great Lakes of North America. It is also one of the world’s largest bodies of fresh water. It is 350 miles (563 km) long (east to west), and at its greatest width it is 160 miles (258 km) from north to south.
Where does water in the Great Lakes originate?
The age of the Great Lakes is still not definitely determined. Estimates range from 7,000 to 32,000 years of age. Water began filling the glacially scoured basins as soon as the ice receded, some 14,000 years ago. It is generally accepted that Lake Erie reached its present level about 10,000 years ago, Lake Ontario about 7,000 years ago, and Lakes Huron, Michigan, and Superior some 3,000 years ago.
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Unknown Waters
The present configuration of the Great Lakes basin is the result of the movement of massive glaciers through the mid-continent, a process that began about one million years ago during the Pleistocene Epoch. Studies in the Lake Superior region indicate that a river system and valleys formed by water erosion existed before the Ice Age. The glaciers undoubtedly scoured these valleys, widening and deepening them and radically changing the drainage of the area.
The last glaciation in North America is called the Wisconsin Glacial Stage because it left many fresh landforms and sediments in that state. As the ice sheet melted and receded about 14,000 years ago, the first segments of the Great Lakes were created. Lake Chicago, in what is now the southern Lake Michigan basin, and Lake Maumee, in present-day western Lake Erie and its adjacent lowlands, originally drained southward into the Mississippi River through the Illinois and Wabash drainages, respectively. As the ice retreat continued, Lake Maumee was drained into Lake Chicago through a valley that now contains the Grand River in Michigan. Eventually, drainage to the east and into the Atlantic Ocean was established, at one time down the valleys of the Mohawk and Hudson rivers and then along the course of the upper St. Lawrence River. At one high-water stage, the waters of the Huron and Michigan basin formed one large lake—Lake Algonquin. At the same time, Lake Duluth, in the western Lake Superior basin, also drained to the Mississippi.
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Prima Assicurazioni S.p.A. è un intermediario assicurativo, iscritto alla Sezione A del Registro Unico degli Intermediari Assicurativi, che distribuisce prodotti di Great Lakes Insurance SE (Gruppo Munich Re), iptiQ EMEA P&C S.A. - Italia e iptiQ EMEA P&C S.A. - Germania.
Grandi Laghi (America) - Wikipedia. I Grandi Laghi dell' America settentrionale sono un complesso di cinque laghi d' acqua dolce, tutti fra i più grandi al mondo, che costituisce una sorta di mare interno compreso fra gli Stati Uniti d'America ed il Canada.
Great Lakes Bathymetry Map showing water depths in the Great Lakes. The lakes vary greatly in depth. Much of Lake Erie is less than 50 feet deep, while large areas in Lake Superior are hundreds of feet deep. The map was prepared by the National Geophysical Data Center in 1999. The Great Lakes Are Warming and set numerous surface water ...
24 feb 2021 · Lake Superior, fra Canada e Stati Uniti. Tag: Stati Uniti. La regione dei Grandi Laghi in America comprende cinque bacini d'acqua dolce, da scoprire ed esplorare: ecco cosa vedere e alcuni consigli.
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