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Manicouagan Reservoir (also Lake Manicouagan / m æ n ɪ k w ɑː ɡ ən,-ɡ ɒ̃ /; French: [manikwaɡɑ̃]) is an annular lake in central Quebec, Canada, covering an area of 1,942 km 2 (750 sq mi). The lake island in its centre is known as René-Levasseur Island , and its highest point is Mount Babel .
One of the largest impact crater lakes is Lake Manicouagan in Canada; the crater is a multiple-ring structure about 100 km (60 mi) across, with its 70 km (40 mi) diameter inner ring its most prominent feature; it contains a 70 km (40 mi) diameter annular lake, surrounding an inner island plateau, René-Levasseur Island.
A man planning a camping trip using Google Maps ran across a uniquely curved spherical pit in Quebec. It may be an ancient asteroid impact crater. A Camper Was Playing With Google Maps—and ...
Mistastin crater was created 36 million years ago by a violent asteroid impact. [9] The presence of cubic zirconia around the crater rim suggests that the impact generated temperatures in excess of 2,370 °C (4,300 °F) — roughly 43% that of the surface of the Sun and the highest crustal temperatures known on Earth [9] — and produced global changes that lasted for decades after the impact.
With a total area of 2,020 km 2 (and a diameter of 50.7 km), the island is larger in area than the annular lake in which it is situated. René-Levasseur Island is the world's second-largest lake island (the largest is Manitoulin Island in Lake Huron). [1] The geological structure was formed by the impact of an asteroid 214 million
The origin of the Nastapoka arc has been a source of disagreement and discussion among geologists, other Earth scientists, and planetary geologists.Noting the paucity of impact structures on Earth in relation to the Moon and Mars and remarkable curvature of the shoreline of this part of Hudson Bay, Beals [1] proposes that the Nastapoka arc is possibly part of a Precambrian extraterrestrial ...
The lake also holds some of the purest fresh water in the world, with a salinity level of less than 3 ppm (by comparison, the salinity level of the Great Lakes is 500 ppm). It is one of the most transparent lakes in the world, with a Secchi disk visible more than 35 m (115 ft) deep. [ 3 ]
The projectile was probably a stony asteroid, at least 2 kilometres (1.2 mi) in diameter, and weighing an estimated 15 billion tonnes (17 billion short tons). The Mont des Éboulements, situated in the exact centre of the impact structure, is interpreted as the central uplift, a consequence of elastic rebound. [3]