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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.
..... Click the link for more information. in the Triassic period, some 214 million years ago. René-Lavesseur Island, 780 sq mi (2,020 sk km), is ringed by the lake.