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Tsunami Hit New York City Region In 300 BC
Hugh Pickens writes "Scientists say that sedimentary deposits from more than 20 cores in New York and New Jersey indicate a huge wave crashed into the New York City region 2,300 years ago, dumping sediment and shells across Long Island and New Jersey and casting wood debris far up the Hudson River. Steven Goodbred, an Earth scientist at Vanderbilt University, says that size and distribution of material would require a high velocity wave and strong currents to move it, and it is unlikely that short bursts produced in a storm would suffice. 'If we're wrong, it was one heck of a storm,' says Goodbred. An Atlantic tsunami is rare but not inconceivable, says Neal Driscoll, a geologist from Scripps Institution of Oceanography, who is not associated with the research. The 1929 Grand Banks tsunami in Newfoundland killed more than two dozen people and snapped many transatlantic cables, and was set in motion by a submarine landslide set off by an earthquake."
A few years ago I had a relative who was involved in a lot of the disaster planning for New Haven. Some scenarios were so bad that he more or less concluded that there wasn't any point in trying to make any substantial preparations because there wouldn't be anything they could do that would help. A large tsunami hitting New England was one of the situations. Either you get a warning on time or you don't. Not much local governments can do about it.
I grew up 5 miles from the water on Central Long Island's "South Shore". When I was a kid my friends father had a large garden, about 80 yards by 20 yards. Every year when he would till/turn the soil, large crumbling shells would turn up. We always wondered why they were so close to the surface in a place that had been above sea level for millions of years. Maybe this is the answer.