Hello Tracy, All, I agree, but the main problem is that the spherule-type material from Canyon Diablo wasn't fired out of anything; it condensed out of a cloud of vapour that formed as a result of the meteorites vaporization upon impact. They weren't necessarily hot to any appreciable degree when they touched ground, and they weren't moving any more quickly than terminal velocity. I think this is just a case of ignorance: of physics, meteorites, etc. Regards, Jason
On Dec 13, 2007 12:41 PM, tracy latimer <[EMAIL PROTECTED]> wrote: > > > I also agree. Any airburst or cratering event sufficiently energetic to > create Meteor-Crater-esque iron spherules and fire them, still smoking, into > mammoth tusks, should result in more definite signs of concussion and heat > damage to the other bones. We should be finding, in conjunction with pitted > mammoth tusks, skeletons with shattered bones, singed hair and flesh and > other remnants, and other evidence of being at the meteoric equivalent of > ground zero. Look at what happened at Tunguska. Where are the charred tree > stumps and other plant matter? > > Playing Devil's advocate for a moment, is there a chance the author is > fudging the findings? Could the proposed results be replicated by, say, > firing a shotgun shell full of coarse iron filings at a tusk, like using > paper from the appropriate era to forge a historical document? Stranger > things have happened in the course of academia, especially when a scientist > has strongly invested in a theory. Human beings also love a fantastic, even > if erroneous, story, over a more pedestrian explanation, despite Occam's > Razor. Is there another, simpler explanation for the findings? > > Just call me Doubting Tracy (I was dubious about the Peru crater as well, and > was happy to have been proven wrong!) > > Tracy Latimer > > > From: [EMAIL PROTECTED] > > To: [email protected] > > Date: Wed, 12 Dec 2007 22:27:33 -0400 > > Subject: Re: [meteorite-list] Mammoths Found Peppered with Meteorite > > Fragments > > > > On Wed, 12 Dec 2007 11:23:33 -0800 (PST), you wrote: > > > >> > >>Eight tusks dating to some 35,000 years ago all show signs of having > >>being peppered with meteorite fragments. > >> > > > > > > > >> > >>The mammoth and bison remains all display small (about 2-3mm in size) > >>perforations. > >> > >>Raised, burnt surface rings trace the point of entry of high-velocity > >>projectiles; and the punctures are on only one side, consistent with a > > > > Okay, does this make much sense to someone better with the math than I am? > > (I'm > > staring in your direction, Sterling). How far would particles of > > meteorititic > > or cometary dust (presumedly from an airburst) be able to travel in > > near-surface > > atmospheric thickness while still retaining enough velocity to penetrate > > bone > > and leave "raised, burnt surface rings"? I'm betting not very far at all. > > Tens > > of meters? Hundreds? I'm betting that if you are close enough to have dust > > (2-3mm) penetrate bone, you are close enough that you are going to be turned > > into a bag of splintered pulp by the shockwave. Just doesn't seem to hold > > water > > to me. > > ______________________________________________ > > http://www.meteoritecentral.com > > Meteorite-list mailing list > > [email protected] > > http://six.pairlist.net/mailman/listinfo/meteorite-list > > _________________________________________________________________ > Share life as it happens with the new Windows Live. > http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_122007 > > ______________________________________________ > http://www.meteoritecentral.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
