Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)

Science News ^ | 6-1-2007 | Sid Perkins

[blam]

Ice Age Ends Smashingly: Did a comet blow up over eastern Canada?

Sid Perkins

Evidence unearthed at more than two dozen sites across North America suggests that an extraterrestrial object exploded in Earth's atmosphere above Canada about 12,900 years ago, just as the climate was warming at the end of the last ice age. The explosion sparked immense wildfires, devastated North America's ecosystems and prehistoric cultures, and triggered a millennium-long cold spell, scientists say.

IT'S IN THERE. A layer of carbon-rich sediment (arrow) found here at Murray Springs, Ariz., and elsewhere across North America, provides evidence that an extraterrestrial object blew up over Canada 12,900 years ago. The hallmarks include lumps of glasslike carbon (top), carbon spherules (middle, in cross section), and magnetic grains rich in iridium (bottom). West; (middle inset): Cannon Microprobe

At sites stretching from California to the Carolinas and as far north as Alberta and Saskatchewan—many of which were home to prehistoric people of the Clovis culture—researchers have long noted an enigmatic layer of carbon-rich sediment that was laid down nearly 13 millennia ago. "Clovis artifacts are never found above this black mat," says Allen West, a geophysicist with Geoscience Consulting in Dewey, Ariz. The layer, typically a few millimeters thick, lies between older, underlying strata that are chock-full of mammoth bones and younger, fossilfree sediments immediately above, he notes.

New analyses of samples taken from 26 of those sites reveal several hallmarks of an extraterrestrial object's impact, West and his colleagues reported at the spring meeting of the American Geophysical Union in Acapulco, Mexico.

Samples from the base of the black mat yield most of the clues to its extraterrestrial origin, says Richard B. Firestone, West's coworker and a nuclear physicist at the Lawrence Berkeley (Calif.)

[SunkenCiv]

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[DallasMike]

Are you serious about this, or was it a tongue-in-cheek post?

Given the flood (heh) of posts over the last couple of months, it was probably serious. See what I'm battling here.

[Boreas]

Let's see if I can remember how to do this:

Buzzard Coulee Meteorite

Buzzard Coulee Meteorite (PDF)

[blam]

Coyoteman was banned from FR. He posts at Darwin Central now as Coyote.

[hennie pennie]

Here's a search from google for the word Porphyria found at Free Republic

a href=http://www.google.com/search?hl=en&source=hp&ie=ISO-8859-1&q=site%3Afreerepublic.com+Porphyria> http://www.google.com/search?hl=en&source=hp&ie=ISO-8859-1&q=site%3Afreerepublic.com+Porphyria

There's a remark about Scandanavian Porphryia on this thread.

[hennie pennie]

Sorry about that; here's the link to the search:

http://www.google.com/search?hl=en&source=hp&ie=ISO-8859-1&q=site%3Afreerepublic.com+Porphyria

[blam]

Ping.