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Prehistoric meteor shower?
tty
post Dec 13 2007, 07:02 PM
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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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djellison
post Dec 19 2007, 04:56 PM
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Yeah - the maths of this makes the likelihood of a particle of that size, traveling fast enough to do that damage very very small.

Doug
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- tty   Prehistoric meteor shower?   Dec 13 2007, 07:02 PM
- - Rob Pinnegar   Yeah, I read this one the other day. Very peculiar...   Dec 14 2007, 04:00 AM
|- - dburt   QUOTE (Rob Pinnegar @ Dec 13 2007, 09:00 ...   Jan 10 2008, 10:20 PM
- - helvick   QUOTE The discovery of the 2–5 millimetre holes le...   Dec 14 2007, 08:55 AM
- - As old as Voyager   The idea that these animals were present and in th...   Dec 16 2007, 12:47 PM
|- - TheChemist   QUOTE (As old as Voyager @ Dec 16 2007, 02...   Dec 16 2007, 03:03 PM
- - helvick   Now that's a much more plausible explanation -...   Dec 16 2007, 02:51 PM
- - djellison   There are records of ancient people using meteorit...   Dec 16 2007, 03:03 PM
- - nprev   Weird story. The only other alternate explanation ...   Dec 16 2007, 06:34 PM
- - Rob Pinnegar   Well, here's a thought. Let's assume for t...   Dec 17 2007, 01:05 AM
- - nprev   I've always wondered about this particular (ap...   Dec 17 2007, 02:42 AM
- - dvandorn   You know, any really energetic impact will create ...   Dec 17 2007, 06:35 AM
- - tty   More details here: http://news.bbc.co.uk/2/hi/sci...   Dec 17 2007, 06:26 PM
- - nprev   Huh. That's pretty damn scary, really. What co...   Dec 17 2007, 09:35 PM
- - tty   Here is a link to the actual AGU poster: http://i...   Dec 17 2007, 11:42 PM
- - tasp   {sorry, did not pay to read entire article, if thi...   Dec 18 2007, 07:11 AM
- - nprev   Problem is that the metallic residue does match me...   Dec 18 2007, 03:23 PM
- - djellison   But surely a meteorite fragment that small would c...   Dec 18 2007, 03:30 PM
|- - nprev   QUOTE (djellison @ Dec 18 2007, 07:30 AM)...   Dec 18 2007, 03:40 PM
|- - helvick   QUOTE (nprev @ Dec 18 2007, 03:40 PM) ......   Dec 18 2007, 09:07 PM
|- - hendric   QUOTE (helvick @ Dec 18 2007, 03:07 PM) Y...   Dec 19 2007, 04:19 PM
- - tasp   OK, read some more on this, and will gladly back o...   Dec 18 2007, 03:33 PM
- - nprev   Yeah, I was thinking about what sort of model woul...   Dec 19 2007, 12:42 AM
|- - lyford   QUOTE (nprev @ Dec 18 2007, 04:42 PM) Sti...   Dec 19 2007, 12:58 AM
|- - AndyG   QUOTE (lyford @ Dec 19 2007, 12:58 AM) Cr...   Dec 19 2007, 11:25 AM
- - nprev   At this point, I'd almost rate that just as li...   Dec 19 2007, 02:05 AM
- - ngunn   Can't help noticing the resemblance between th...   Dec 19 2007, 11:59 AM
- - algorimancer   I wonder whether this may have more to do with the...   Dec 19 2007, 02:45 PM
|- - ngunn   QUOTE (algorimancer @ Dec 19 2007, 02:45 ...   Dec 19 2007, 03:34 PM
|- - algorimancer   QUOTE (ngunn @ Dec 19 2007, 09:34 AM) May...   Dec 19 2007, 04:17 PM
|- - helvick   QUOTE (ngunn @ Dec 19 2007, 03:34 PM) May...   Dec 19 2007, 04:44 PM
- - djellison   Yeah - the maths of this makes the likelihood of a...   Dec 19 2007, 04:56 PM
|- - nprev   QUOTE (djellison @ Dec 19 2007, 08:56 AM)...   Dec 19 2007, 06:38 PM
- - dvandorn   Sounds like we ought to move this discussion to th...   Dec 19 2007, 06:05 PM
- - ngunn   I really think we need Don Burt here, but I think ...   Dec 19 2007, 10:27 PM
|- - dburt   QUOTE (ngunn @ Dec 19 2007, 03:27 PM) I r...   Dec 20 2007, 11:03 PM
- - PDP8E   Fascinating mystery! Airburst? rocky meteors ...   Dec 20 2007, 03:13 AM
- - ngunn   Thank you for that, Don, very informative (and ver...   Dec 21 2007, 09:08 AM
|- - dburt   QUOTE (ngunn @ Dec 21 2007, 02:08 AM) Tha...   Dec 22 2007, 04:08 AM
|- - ngunn   QUOTE (dburt @ Dec 22 2007, 04:08 AM) I t...   Dec 22 2007, 11:44 PM
|- - dburt   QUOTE (ngunn @ Dec 22 2007, 04:44 PM) ......   Dec 24 2007, 10:34 PM
- - nprev   Boy howdy... ...yeah, I'd call that "out...   Jan 10 2008, 10:54 PM
- - TheChemist   If I understood well, this refers mainly to a 12,9...   Jan 11 2008, 05:04 PM
|- - dburt   QUOTE (TheChemist @ Jan 11 2008, 10:04 AM...   Jan 12 2008, 05:25 AM
|- - dburt   QUOTE (TheChemist @ Jan 11 2008, 10:04 AM...   Jan 15 2008, 03:36 AM
- - nprev   Just adding this as a data input: seems that fragm...   Jan 12 2008, 08:18 PM
- - TheChemist   Thanks Don, I had a look at the AGU abstract, and ...   Jan 15 2008, 10:54 AM

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