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em novembro 07, 2020

how deep is lake superior

The largest island in Lake Superior is Isle Royale in the state of Michigan. SS Edmund Fitzgerald was the latest ship to sink in Lake Superior, 15 nautical miles (28 km; 17 mi) from Whitefish Point in a storm on November 10, 1975. The rocks of Lake Superior's northern shore date back to the early history of the earth. 7. Records show that Lake Michigan and Lake Ontario are the only lakes to have resisted freezing over since recording began in the early 1900s. 5. [7][8][9] Lake Superior contains 2,900 cubic miles (12,100 km³) of water. 48 feet long (15 m) Crater Lake is the deepest lake in the … State Journal archives SS Edmund Fitzgerald. In 1918 the last warships to sink in the Great Lakes, French minesweepers Inkerman and Cerisoles, vanished in a Lake Superior storm, perhaps upon striking the uncharted danger of the Superior Shoal in an otherwise deep part of the lake. With a total water surface of 82,000 sq km or 31,700 sq mi and an average depth of 147 meters or 483 feet, many sea vessels succumb to its ever-changing currents. [44] This is because of the unusually cold water, under 36 Â°F (2 Â°C) on average around 1970. This hard diabase protects the layers of sedimentary rock below, forming the flat-topped mesas in the Thunder Bay area. The first steamboat to run on the lake was the Independence in 1847, whereas the first steamers on the other Great Lakes began sailing in 1816.[39][40]. Large cargo vessels called lake freighters, as well as smaller ocean-going freighters, transport these commodities across Lake Superior. Michiganders sure are lucky to live amongst so much beauty. ), While the temperature of the surface of Lake Superior varies seasonally, the temperature below 110 fathoms (660 ft; 200 m) is an almost constant 39 Â°F (4 Â°C). Accidental introductions have occurred in part by the removal of natural barriers to navigation between the Great Lakes. The lake's average surface elevation is 600 feet (183 m)[8][17] above sea level. The larger cities on Lake Superior include the twin ports of Duluth, Minnesota and Superior, Wisconsin; Thunder Bay, Ontario; Marquette, Michigan; and the twin cities of Sault Ste. [a] The shoreline of the lake stretches 2,726 miles (4,387 km) (including islands). Marie in 1662. [13], The first French explorers approaching the great inland sea by way of the Ottawa River and Lake Huron in the 17th century referred to their discovery as le lac supérieur (the upper lake, i.e. There are rapids at the river's upper (Lake Superior) end, where the river bed has a relatively steep gradient. Winter temperatures around the lake rarely fall below minus 30 F (minus 34 C), well above inland temperatures. It has an Average Depth of 483 ft (147 m) deep. Whitefish Bay, southeastern arm of Lake Superior, the centre of which forms the border of Ontario (Can.) Many towns around the lake are current or former mining areas, or engaged in processing or shipping. and Michigan (U.S.). Lake Superior is the largest freshwater lake in the world in area and the third largest in volume, behind Lake Baikal in Siberia and Lake Tanganyika in East Africa. Lake Superior is the largest of the Great Lakes of North America, the world's largest freshwater lake by surface area, and the third largest freshwater lake by volume. This shoal rises vertically from Lake Superior’s 280 foot bottom, and lies only three feet beneath the water. Lake Vostok - ~1,000 m/~3,300 ft. Vostok Lake in Antarctica is, at 3,300 feet, the fourth deepest … The continental crust was later riven, creating one of the deepest rifts in the world. [19] Waves well over 30 feet (9 m) have been recorded.[20]. Lake Superior is 350 miles (563 km) long (east to west), and its greatest width is 160 miles (258 km) from north to south. Twice per year, however, the water column reaches a uniform temperature of 39 Â°F (4 Â°C) from top to bottom, and the lake waters thoroughly mix. The regulating structure is known as the Compensating Works and is operated according to a regulation plan known as Plan 1977-A. The Lake Superior region is also home to many common native plant species, including Michigan's state tree, the white pine, and Flowering Rush, an aquatic plant that grows along the shoreline. Lake whitefish live in deep waters mainly along Lake Superior's South Shore. [45] Joe MacInnis reported that in July 1994, explorer Frederick Shannon's Expedition 94 to the wreck of Edmund Fitzgerald discovered a man's body near the port side of her pilothouse, not far from the open door, "fully clothed, wearing an orange life jacket, and lying face down in the sediment". Lake Superior boasts extremely clear water, with an average underwater visibility of 27 feet (8.2 m). This feature makes the lake dimictic.

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