Atlantis Online
December 08, 2023, 11:02:12 am
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Ancient Crash, Epic Wave

  Home Help Arcade Gallery Links Staff List Calendar Login Register  

Did asteroid cause ancient N.Y. tsunami?

Pages: [1]   Go Down
Author Topic: Did asteroid cause ancient N.Y. tsunami?  (Read 198 times)
Major Weatherly
Superhero Member
Posts: 4848

« on: August 26, 2009, 01:33:16 pm »

Did asteroid cause ancient N.Y. tsunami?

New clues suggest an 330-foot asteroid slammed into the Atlantic Ocean

NYC's 'skinniest' house has fat price tag: $2.7M
Jon and Kate’s ‘8’ revolt against being filmed
/id/325619335.5M window covers recalled after child deaths
Kennedy successor to be chosen by special vote
CIA's instructions for breaking a detainee's will
Most viewed on      
Ariz. woman finds taxi driver is a kidney match
Is PSA about texting while driving too graphic?
Cop: Mom, son hysterical after gang ****
FBI director rips release of Lockerbie bomber
New clue found to disappearing honey bees
Most viewed on      
/id/325619335.5M window covers recalled after child deaths
NYC's 'skinniest' house has fat price tag: $2.7M
Smoking pot could curb risk of some cancers
New clue found to disappearing honey bees
S.C. retiree is $260 million Powerball winner
Most viewed on   
By Michael Reilly
updated 3:39 p.m. CT, Thurs., 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.
Story continues below ↓

advertisement | your ad here

"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."
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.
Click for related content
Single-celled giant upends early evolution
Copernicus’ remains and grave found
6,500-year-old village found in Greece
"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.
© 2009 Discovery Channel
Report Spam   Logged

Share on Facebook Share on Twitter

Pages: [1]   Go Up
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum
Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy