Manicouagan crater
The Manicouagan crater may have been part of a multiple impact event which also formed the Rochechouart crater in France, Saint Martin crater in Manitoba, Obolon' crater in Ukraine, and Red Wing crater in North Dakota. The five craters form a chain, indicating the breakup and subsequent impact of an asteroid or comet, like the impacts of Comet Shoemaker-Levy 9 on Jupiter in 1994.