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<p>[QUOTE=&quot;atcarroll, post: 4220473, member: 77294&quot;]There&#039;s a hypothesis that a comet or comet fragments struck the ice sheet in north america sometime around 9,600 BC, the evidence has been found in the form of nanodiamonds and high temperature minerals in the younger dryas boundry layer, and there are a few candidates for impact crater locations. An impact on the ice sheet could have released a tremendous amount of meltwater in a short period of time, sea level could have risen a hundred feet or more in a matter of weeks. Anybody living close to the shore would have faced a catastrophe, and the impact itself and the release of the weight of the ice would have caused earthquakes as well.[/QUOTE]</p><p><br /></p>

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