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 17 2007, 01:05 AM
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Member Group: Members Posts: 509 Joined: 2-July 05 From: Calgary, Alberta Member No.: 426 |
Well, here's a thought. Let's assume for the moment that things happened the way the authors suspect they did.
One of the key points here is the geographic distribution of the bones. Keep in mind that we're talking about very small fragments of meteorite here. Thus the animals in question might not have been killed by the impact. They may have subsequently wandered a long distance before eventually dying -- throughout Alaska and over the Beringia bridge into Siberia. Thus the impact event could have been localized to Alaska. |
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