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• Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling.
  R. B. Firestone and A. West and J. P. Kennett and L. Becker and T. E. Bunch and Z. S. Revay and P. H. Schultz and T. Belgya and D. J. Kennett and J. M. Erlandson and O. J. Dickenson and A. C. Goodyear and R. S. Harris and G. A. Howard and J. B. Kloosterman and P. Lechler and P. A. Mayewski and J. Montgomery and R. Poreda and T. Darrah and S. S. Que Hee and A. R. Smith and A. Stich and W. Topping and J. H. Wittke and W. S. Wolbach Proceedings of the National Academy of Sciences of the United States of America 104 16016--16021 (2007)
  to Carolina_Bays Clovis Holocene_extinction Younger_Dryas carbon_rich_black_layer charcoal fullerenes magnetic_microspherules nanodiamond by thulefoth on 2008-05-13 07:51:48
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