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Manicouagan Reservoir
Manicouagan Reservoir (also Lake Manicouagan) is an annular lake (ringlike lake) in central Quebec, Canada. The lake covers an area of 1,942 km², and its eastern shore is accessible via Route 389. The lake island in the centre of the lake is known as René-Levasseur Island, and its highest point is Mount Babel. The lake and island are clearly seen from space and are sometimes called the "eye of Quebec." With a volume of , the reservoir itself is the fifth largest in the world by volume, although only can be used for hydro-electric power production.〔 In 2007, astronaut Marc Garneau nominated the reservoir for the CBC's ''Seven Wonders of Canada'' competition.
==Manicouagan impact crater==
(詳細はimpact crater (astrobleme). The crater was formed following the impact of an asteroid with a diameter of , which excavated a crater originally about wide, although erosion and deposition of sediments have since reduced the visible diameter to about . It is the sixth-largest confirmed impact crater known on earth.〔(Earth Impact Database )〕 Mount Babel is interpreted as the central peak of the crater, formed by post-impact uplift.
Research has shown that impact melt within the crater has an age of 214±1 million years. As this is 12±2 million years before the end of the Triassic, the impact that produced the crater cannot have been the cause of the Triassic-Jurassic extinction event.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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