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The Manicouagan Crater in northern Canada is one of the oldest known impact craters. Formed during what was surely a tremendous impact approximately 200 million years ago, today the land supports a 70 km diameter hydroelectric reservoir with the revealing shape of an annular lake.
The crater itself has been worn out by the passage of glaciers and other erosive processes. The hard rock of the impact site has still retained much of the complex shocking structure and offers scientists a relevant case to help understand the consequences of major impacts on the Earth and other bodies of the solar system.
We can also see above the vertical fin of the Columbia Space Shuttle from which the photograph was taken in 1983.
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