The Chesapeake Bay impact crater was formed by a bolide that impacted the eastern shore of North America about 35 million years ago, in the late Eocene epoch. It is one of the best-preserved "wet-target" or marine impact craters, and the largest known impact crater in the U.S. Continued slumping of sediments over the rubble of the crater has helped shape Chesapeake Bay.
Read more about Chesapeake Bay Impact Crater: Formation and Aftermath, Discovery, Effects On Local Rivers
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