Now researchers have evidence suggesting that an asteroid roughly 200 yards (183 meters) wide crashed off the coast of New Jersey and sent tsunamis surging toward what is now New York City some 2,300 years ago.

New York City lies at the mouth of the Hudson. When the scientists drilled out tubes of sediment from the New York and New Jersey area, they discovered layers of unusual debris that, they suggest, were laid down by tsunamis.

Within these potential tsunami layers is evidence of a cosmic impact, including shocked minerals and microscopic carbon beads loaded with "nano-diamonds," which are "all things only impacts can do," Abbott said. One candidate for the crater that was produced by this impact, she said, lies in the undersea Carteret Canyon, located roughly 90 miles (150 km) off the coast of New Jersey.

Originally posted by Aggie Man
Wow, this is interesting. Imagine what kind of havoc this would have caused if it had hit in modern times.