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Date : 2009-03-04
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More Evidence of a Comet Catastrophe 13000 Years Ago ~ More evidence continues to accumulate that a planetwide catastrophe occurred some 13000 years ago supporting the controversial Younger Dryas Impact Hypothesis which postulates that a fragmented comet slammed into the Earth around 12800 years ago causing massive effects ranging from rapid climate change to megafaunal extinctions and
Younger Dryas impact A Catastrophe of Comets ~ From Evidence for an extraterestrial impact 12900 years ago that led to the megafaunal extinctions and the Younger Dryas cooling by Firestone et al 2007 we read “Toon et al suggest that an impact capable of continentwide damage requires energy of 107 megatons equivalent to an impact by a 4kmwide comet
The Younger Dryas impact hypothesis A cosmic catastrophe ~ In this paper we review the evidence for the Younger Dryas impact hypothesis YDIH which proposes that at ∼129k cal a BP North America South America Europe and the Middle East were
younger Dryas impact event A Catastrophe of Comets ~ The Younger Dryas impact event was a catastrophe more violent than any one has ever imagined in their most frightening nightmares of devastation And the trouble with studying it is that all of the Earth sciences are founded on the 19th century assumptions of uniform gradual geologic change
The Younger Dryas A Catastrophe of Comets ~ Pollen from the Dryas flower an arctic species lends its name to this very cold interval The Younger Dryas cold was first thought to have been confined to northwest Europe with a possible extension to some other localities immediately surrounding the North Atlantic
New studies adds support for Younger Dryas impact event ~ The 26Al10Be ratio is much larger in extraterrestrial objects than in the atmosphere and so we note that measuring this ratio in ice cores is a suitable definitive test for the Younger Dryas impact hypothesis even if the hypothetical bolide is not a longperiod comet andor did not contribute to the 14C and 10Be increases
Younger Dryas impact hypothesis Wikipedia ~ The Younger Dryas impact hypothesis or Clovis comet hypothesis posits that fragments of a large more than 4 kilometers in diameter disintegrating asteroid or comet struck North America South America Europe and western Asia about 12800 years ago
The Benavides Impact Structure A Catastrophe of Comets ~ A large multiple airburst geoablative impact structure The semi circular ring of The Benavides Impact Structure is 17 miles wide Just across the border from Terlingua Texas and Big Bend National Park USA The maps show this area to be volcanic due to the melt formations But don’t you believe it There is no volcanic…
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