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News: DID A COMET CAUSE A FIRESTORM THAT DEVESTATED NORTH AMERICA 12,900 YEARS AGO?
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Catastrophe: Which Ancient Disaster was the One to Destroy Atlantis?

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Author Topic: Catastrophe: Which Ancient Disaster was the One to Destroy Atlantis?  (Read 1986 times)
Adam Hawthorne
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« on: September 16, 2009, 11:30:18 pm »

The seond page of this piece:

"The comet (-like event) was followed by a barrage of hot particles. If that didn't kill all of the large animals, then the immediate climate changes must have," said Firestone.

Firestone said smaller animals could have sought shelter more readily, by going into caves or underground.

The findings were presented at last weekend's "World of Elephants" international conference in Hot Springs, S.D.

In addition to the tusk evidence, the scientists said arrowheads from North America's prehistoric Clovis culture, which went extinct around 13,500-13,000 years ago, Icelandic marine sediment, as well as sediment from nine 13,000-year-old sites in North America, contain higher-than-normal amounts of radiation in the form of potassium-40 levels.

Potassium-40 is a radioactive isotope, meaning a molecule that emits radiation.


Magnetic particles also were unearthed at the sites. Analysis of these particles revealed they are rich in titanium, iron, manganese, vanadium, rare-earth elements, thorium and uranium.

These elements all are common in moon rocks and lunar meteorites, so the researchers think the materials provide additional evidence that North America was bombarded 13,000 years ago by material originating from space.

Luann Becker, a University of California at Santa Barbara geologist, told Discovery News she was not surprised by the new supernova theory, since extinction events have been linked to similar comet or asteroid impacts before.

"What is exciting about Dr. Firestone's theory is that it can be easily tested," Becker said, and indicated she hopes future research will yield additional clues from North American and other sediment layers.

http://dsc.discovery.com/news/briefs/20050926/mammoth_02.html
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