Evidence for an extraterrestrial impact 12,900 years ago that contributed to the megafaunal extinctions and the Younger Dryas cooling

A carbon-rich black layer, dating to ...12.9 ka, has been previously identified at ...50 Clovis-age sites across North America and appears contemporaneous with the abrupt onset of Younger Dryas (YD) cooling. The in situ bones of extinct Pleistocene megafauna, along with Clovis tool assemblages, occu...

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Veröffentlicht in:	Proceedings of the National Academy of Sciences - PNAS 2007-10, Vol.104 (41), p.16015
Hauptverfasser:	Firestone, R B, West, A, Kennett, J P, Becker, L, Bunch, T E, Revay, Z S, Schultz, P H, Belgya, T, Kennett, D J, Erlandson, J M, Dickenson, O J, Goodyear, A C, Harris, R S, Howard, G A, Kloosterman, J B, Lechler, P, Mayewski, P A, Montgomery, J, Poreda, R, Darrah, T, Hee, S S Que, Smith, A R, Stich, A, Topping, W, Wittke, J H, Wolbach, W S
Format:	Artikel
Sprache:	eng
Schlagworte:	Comets Environmental impact Extinction Geophysics Meteors & meteorites Paleobotany
Online-Zugang:	Volltext
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