Manicouagan Reservoir

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Manicouagan Reservoir

(mănĭkwäg`ən), annular artifical lake, 750 sq mi (1,942 sq km), SE Que., Canada, in a heavily forested area of the Canadian Shield. It has a maximum depth of 1,150 ft (300 m). Fed by four rivers, it was created by the Daniel Johnson Dam (1971), 25 mi (40 km) S of the reservoir on the Manicouagan River, and is located in one of the largest impact craters on earth. The crater was produced by a meteoritemeteorite,
meteor that survives the intense heat of atmospheric friction and reaches the earth's surface. Because of the destructive effects of this friction, only the very largest meteors become meteorites.
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 in the Triassic period, some 214 million years ago. René-Lavesseur Island, 780 sq mi (2,020 sk km), is ringed by the lake.
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