Prehistoric meteor shower? |
Prehistoric meteor shower? |
Dec 13 2007, 07:02 PM
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#1
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Member Group: Members Posts: 688 Joined: 20-April 05 From: Sweden Member No.: 273 |
A real weird news story from Nature about meteor damage to pleistocene fossils:
http://www.nature.com/news/2007/071212/ful...s.2007.372.html If traces of this meteor shower has been found in both Siberia and Alaska as the story implies, then multiple impactors must have been involved. Such small meterites would lose speed quickly so the airburst must have occurred at fairly low altitude. |
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Dec 14 2007, 04:00 AM
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#2
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Member Group: Members Posts: 509 Joined: 2-July 05 From: Calgary, Alberta Member No.: 426 |
Yeah, I read this one the other day. Very peculiar (and, really, more-or-less unbelievable).
It should at least be interesting to see how it develops. |
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Jan 10 2008, 10:20 PM
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#3
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Member Group: Members Posts: 384 Joined: 4-January 07 Member No.: 1555 |
Yeah, I read this one the other day. Very peculiar (and, really, more-or-less unbelievable)... I'll also quote Helvick: "I can't see how this could be possible." These two early reactions here at UMSF (very different from mine, I freely admit) have been formulated in far more detail, with documentation and numerous literature citations, in the January, 2008 issue of GSA Today, the monthly newsletter of the Geological Society of America, p. 37-38, here: http://www.gsajournals.org/perlserv/?reque...;issn=1052-5173 The authors are Nicholas Pinter and Scott Ishman of SIU and the full 2-page article (amazingly outspoken) is here: http://www.gsajournals.org/perlserv/?reque...2FGSAT01801GW.1 Basically, using phrases such as "observations and claims so wild," "Frankenstein monster," "runs roughshod over ... evidence," "ignore extensive literature," and "played out primarily in the popular press," they ascribe the microparticles and microspherules to the normal constant infall of sand-sized micrometeorites, plus normal wildfires, and the extinctions of giant mammals to conventional causes (e.g., climate change and the influence of early humans). Just FYI, and DBETYR (don't believe everything you read). -- HDP Don |
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