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Did Asteroid Cause Ancient N.Y. Tsunami?

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Author Topic: Did Asteroid Cause Ancient N.Y. Tsunami?  (Read 142 times)
Adam Hawthorne
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Posts: 4250

« on: November 23, 2008, 04:24:38 am »

Did Asteroid Cause Ancient N.Y. Tsunami?
Michael Reilly, Discovery News

Getty Images |
Tsunami Central?
More than 2,300 years ago, a tsunami may have hit what is now New York City. The source of the giant wave, say geologists studying the sediments in nearby bodies of water, may have been a 330-foot-wide asteroid.

Tsunami Central? | Discovery News Video  Nov. 20, 2008 -- Long before New York City was the Big Apple, or even New Amsterdam, a giant tsunami crashed ashore.

It was 2,300 years ago. The Palisades that frame the Hudson River were whisper-quiet, the sandy beaches of Long Island and New Jersey empty, and Manhattan was still just an unbroken sylvan carpet.

Then came the mammoth wave, roaring into the serenity. No one knows for sure what caused it, but new clues found in the Hudson's silt suggest an asteroid 100 meters (330 feet) in diameter slammed into the Atlantic Ocean nearby.

WATCH VIDEO: See how a 65-foot wave could inundate New York City. While sifting through samples, Katherine Cagen of Harvard University and a team of researchers found carbon spherules -- perfectly round particles that form in the extreme pressures of an impact.

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Michael Reilly's Blog: Strike Slip Famous Tsunamis


"But the main thing that closes the deal is that we looked in the spherules and found nano-diamonds," said Dallas Abbott of Columbia University, a co-author on the work. "These have only been found in impact ejecta or in meteorites."

The team found grains of several shocked minerals in the sediments as well, but the discovery remains controversial.

"To get a wave 2.5 meters high that far up the Hudson, you need a wave 20 meters high at Manhattan," said Steven Ward of the University of California, Santa Cruz. "It would've gone several hundred meters inland on Long Island; you should see evidence of this thing all over the place."

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Adam Hawthorne
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Posts: 4250

« Reply #1 on: November 23, 2008, 04:30:59 am »

Even worse, telling the difference between sediments washed up in a tsunami and those left by a strong storm can be incredibly difficult.

So far the team has only found impact ejecta in deposits in the Hudson, with some as far as 50 kilometers (31 miles) upriver from the mouth. But they have taken samples of suspicious-looking sediments along the coasts of New Jersey and Long Island as well, and hope to find more of the same strange minerals pointing to an impact origin.

"We've had strong storms in New York's history that haven't made deposits anything like this," Cagen said. "We don't know how big it was, but it would have been more than a splash against Manhattan; the city would have been devastated."

Cagen is convinced her team's work proves an impact caused the tsunami but admits they'll need to find the smoking gun -- a crater, probably buried in the continental shelf off New Jersey -- to convince skeptics.

"We're making the pretty outrageous claim that not only did a tsunami hit the New York metropolitan area 2,300 years ago, but it was caused by an asteroid impact for which we can't find a crater," she said.

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Mario Dantas
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Posts: 1376

« Reply #2 on: November 23, 2008, 01:10:36 pm »

Dear Adam,

Should there be a connection between Atlantis and this specific event? Definitely!

Greenland "whip cracked" various regions, such as your post indicates, "just" under Newfoundland (Island) which i think should be the main evidence of the Westerner Atlantic "shock" of Continental plates. When the "dislocation" begun... there was brutal energy applied to the elements,  as a consequence of the explosive power of moving crust, upon hot lava... what's more interesting even is the enormous amount of debris found up North, in Canadian and Alaskan regions... firstly the Sahara, then America (Newfoundland Island "split up"), then Europe and lastly Scandinavia.

Poseidon is seen as "savior of ships" and "Earth shaker" but mainly as a sea god for a reason, everywhere his actions occurred, they were intimately connected, also Zeus and Hades also must have "participated" in the action being his brothers and contemporaries...

(maybe some of those punctuations were originated on Earth?)

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