Posted on 09/30/2007 10:14:28 AM PDT by baynut
A carbon-rich black layer, dating to 12.9 ka, has been previously identified at 50 Clovis-age sites across North America and appears contemporaneous with the abrupt onset of Younger Dryas (YD) cooling. The in situ bones of extinct Pleistocene megafauna, along with Clovis tool assemblages, occur below this black layer but not within or above it. Causes for the extinctions, YD cooling, and termination of Clovis culture have long been controversial. In this paper, we provide evidence for an extraterrestrial (ET) impact event at 12.9 ka, which we hypothesize caused abrupt environmental changes that contributed to YD cooling, major ecological reorganization, broad-scale extinctions, and rapid human behavioral shifts at the end of the Clovis Period. Clovis-age sites in North American are overlain by a thin, discrete layer with varying peak abundances of (i)magnetic grains with iridium, (ii) magnetic microspherules, (iii) charcoal, (iv) soot, (v) carbon spherules, (vi) glass-like carbon containing nanodiamonds, and (vii) fullerenes with ET helium, all of which are evidence for an ET impact and associated biomass burning at 12.9 ka. This layer also extends throughout at least 15 Carolina Bays, which are unique, elliptical depressions, oriented to the northwest across the Atlantic Coastal Plain. We propose that one or more large, low-density ET objects exploded over northern North America, partially destabilizing the Laurentide Ice Sheet and triggering YD cooling. The shock wave, thermal pulse, and event-related environmental effects (e.g., extensive biomass burning and food limitations) contributed to end-Pleistocene megafaunal extinctions and adaptive shifts among PaleoAmericans in North America.
This happened 12,900 years ago and it’s breaking news?
Catastrophism.
Is there a babelfish translation of this?
Bush’s fault.
Bush’s fault.
Wow! Great minds think alike!
Relatively speaking. /snicker
Stuff happens.
Saw a good program on History channel very recently about MegaDisassers, including impacts by comets and such and the residue left behind and other physical evidence of some pretty good hits..
This happened 12,900 years ago and it’s breaking news? Hell, that's not so bad -- it'll take longer than that for the MSM to get around to publishing any good news out of Iraq>
His ancestors were visionaries and worked hard at guaranteeing the demise of the democratic party today.
Don't underestimate the focus of the VRWC. LOL!
A cerbun-reech bleck leyer, deteeng tu 12.9 ka, hes beee prefeeuoosly identeeffied et 50 Clufees-ege-a seetes ecruss Nurt Emereeca und eppeers cuntempuruneuoos veet zee ebroopt oonset ooff Yuoonger Dryes (YD) cuuleeng. Zee in seetoo bunes ooff ixteenct Pleeestucene-a megeffoona, elung veet Clufees tuul essembleges, ooccoor beloo thees bleck leyer boot nut veethin oor ebufe-a it. Cooses fur zee ixteencshuns, YD cuuleeng, und termeeneshun ooff Clufees cooltoore-a hefe-a lung beee cuntruferseeel. In thees peper, ve-a prufeede-a ifeedence-a fur un ixtreterrestreeel (IT) impect ifent et 12.9 ka, vheech ve-a hypuzeeseeze-a coosed ebroopt infurunmentel chunges thet cuntreebooted tu YD cuuleeng, mejur iculugeecel reurguneezeshun, brued-scele-a ixteencshuns, und repeed hoomun behefeeurel sheeffts et zee ind ooff zee Clufees Pereeud. Clufees-ege-a seetes in Nurt Emereecun ere-a ooferleeen by a theen, deescrete-a leyer veet feryeeng peek eboondunces ooff (i)megneteec greeens veet ireedioom, (iee) megneteec meecruspherooles, (ieei) chercuel, (if) suut, (f) cerbun spherooles, (fee) gless-leeke-a cerbun cunteeening nunudeeemunds, und (feei) foollerenes veet IT heleeoom, ell ooff vheech ere-a ifeedence-a fur un IT impect und essuceeeted beeumess boorneeng et 12.9 ka. Thees leyer elsu ixtends thruooghuoot et leest 15 Ceruleena Beys, vheech ere-a uneeqooe-a, illeepticel depresseeuns, ooreeented tu zee nurthvest ecruss zee Etlunteec Cuestel Pleeen. Ve-a prupuse-a thet oone-a oor mure-a lerge-a, loo-denseety IT oobjects ixpluded oofer nurzeern Nurt Emereeca, perteeelly destebeelizing zee Loorenteede-a Ice-a Sheet und treeggering YD cuuleeng. Zee shuck vefe-a, zeermel poolse-a, und ifent-releted infurunmentel iffffects (i.g., ixtenseefe-a beeumess boorneeng und fuud leemiteshuns) cuntreebooted tu ind-Pleeestucene-a megeffoonel ixteencshuns und edepteefe-a sheeffts emung PeleuEmereecuns in Nurt Emereeca.
Here’s a good background article, gay state:
New Theory: Did a Prehistoric Comet ‘Kill’ North America?
http://www.santabarbaranewsroom.com/news/science-news/new-theory-did-a-prehistoric-comet-kill-north-america.html
They’re coming to take me away.
We're only talking 10's of thousands of years here.
The MSM must seeing a bit of light. ; )
Another repeat by The History Channel...
Neanderthal women and children hardest hit.
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