Younger Dryas - likely the result of meteor impact

  1. jim mcnamara

    jim mcnamara 1,488
    Science Advisor
    Gold Member

    Origin and provenance of spherules and magnetic grains at the Younger Dryas boundary
    Yingzhe Wu, Mukul Sharma, Malcolm A. LeCompte, Mark N. Demitroff, and Joshua D. Landis
    PNAS 2013 ; published ahead of print September 5, 2013, doi:10.1073/pnas.1304059110
    From the pnas.org overview:
    The takeaway is that a large meteor impact in Quebec showered a very large area in Northeastern North America with hot debris. The debris is at the exact boundary of the onset of the Younger Dryas. If this impact did not entirely cause the Younger Dryas cooling, it certainly is the most likely major player in the event. (My interpretation).

    Mukul Sharma, one of the researchers, said as much in an article earlier:
    http://www.theregister.co.uk/2013/0...d_for_triggering_younger_dryas_climate_shift/
     
  2. jcsd
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  3. Greg Bernhardt

    Staff: Admin

    Interesting, thanks for sharing Jim!
     
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