Prehistoric meteor shower? |
Prehistoric meteor shower? |
Dec 13 2007, 07:02 PM
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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 19 2007, 10:27 PM
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I really think we need Don Burt here, but I think he would say that the 'air' through which the particles were falling would also have been pretty hot, like the cloud from an explosive volcanic eruption. The animals would have suffered burns from that alone, and the spherules would have experienced less cooling (and less deceleration) than if they had been falling through ordinary cool air. The whole collapsing column of heated gas and solids would have been descending on them. I imagine them pinned to the ground and in considerable distress.
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