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News: USA showered by a watery comet ~11,000 years ago, ending the Golden Age of man in America
http://dsc.discovery.com/news/briefs/20050926/mammoth_02.html
 
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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 2529 times)
Adam Hawthorne
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« Reply #15 on: September 16, 2009, 11:50:25 pm »

Younger Dryas

Another angle of this powerful discovery is that the 12,900 BP time-frame offered by the evidence of the overall cataclysm fits very well with the sudden re-advance of the ice sheet following some 2,000 years when it had been in withdrawal. This is known to geologists and climatologists as the Younger Dryas.

In the past, the Younger Dryas was put down to climate changes caused by melt waters from the ice sheets flowing into the Great Lakes, and then south through the Mississippi river into the Gulf of Mexico. This then allowed melt water to flow eastward into the Atlantic Ocean, helping to ‘switch off’ the ocean’s saltwater-driven ‘conveyor belt’ current, bringing the entire Gulf Steam to a halt and triggering a mini ice age.

Now, however, there is growing speculation that the Younger Dryas might well have resulted from airborne debris caused by the impact and subsequent firestorms blocking out sunlight, as well as the release of melt water from the primary Ice Sheet that would indeed have flowed eastwards, opening up new drainage channels into the Atlantic Ocean.

‘What we suggest is that the meltwater outflow from the proglacial lakes and from the temporarily melting ice sheet was the result of extraterrestrial impact,’ Jim Kennett explains.

At the same time no less that 35 genera of the continent’s species suddenly became extinct including camels, mastodons, ground sloths and horses, while the Clovis culture, which had flourished for at least a thousand years, diminished by an estimated 70 percent. Previously, the extinction of the Pleistocene animal species has been put down to either the Younger Dryas or over hunting on the part of the hunter-gathering Clovis culture.

However, from 12,900-year-old carbon-rich layers at Murray Springs, Arizona, as well as in sediment cores extracted from examples of the Carolina Bays, chemist Wendy Wolbach has detected ‘significant quantities of soot’, which is unquestionably a product of intense wildfires. Polycyclic aromatic hydrocarbons ­ another signature of wildfires, has also been detected at the team’s sites by geologist Luanne Becker of the University of California, Santa Barbara.

The conclusion is obvious say the team. Huge wildfires swept across the North American continent following the impacts, destroying whole populations of animals and humans. ‘I don’t want to sound catastrophic here,’ said Kennett, ‘but this is wild stuff. There is significant evidence of massive biomass burning.’

Archaeologist Al Goodyear of the University of South Carolina, told the conference that there is ‘indirect evidence of a human disaster in what is now the south-eastern US’. Distinctive style Clovis points suddenly disappear, only to be replaced around 12,700 BP by another style altogether known collectively as ‘red points’. These then outnumber the Clovis point 4 to 1, which if an indication of the rapid depletion of the population, strongly suggesting that up to 70 percent of the Clovis population no longer existed.

As previously mentioned, it is going to be a hard struggle convincing cataclysm skeptics of this incredible new scenario at the end of the Pleistocene epoch. As Kennett jokes: ‘You watch it, there will be blood on the streets.’

For further information, see the New Scientist online story ‘Did a comet wipe out prehistoric Americans’ found at environment.newscientist.com/article/ dn11909-did-a-comet-wipe-out-prehistoric-americans.html


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