An Independent Evaluation of the Younger Dryas Extraterrestrial Impact Hypothesis

Details An Independent Evaluation of the Younger Dryas Extraterrestrial Impact Hypothesis An Independent Evaluation of the Younger Dryas Extraterrestrial Impact Hypothesis

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmpp31d1396s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #PP31D-1396

Mathematics

Logic

[6022] Planetary Sciences: Comets And Small Bodies / Impact Phenomena

Scientific paper

Based on elevated concentrations of a set of impact markers at the onset of the Younger Dryas stadial from sedimentary contexts across North America, Firestone, Kennett, West, and others have argued that 12.9 ka, the Earth experienced an impact by an extraterrestrial body, an event that had devastating ecological consequences for humans, plants, and animals in the New World. In this paper, we report the results of an independent analysis of magnetic minerals and microspherules from seven sites of similar age including two previously examined by Firestone et al. We were unable to reproduce any results of the Firestone et al. study and find no support for Younger Dryas extraterrestrial impact.

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