Skip to comments.Six North American sites hold 12,900-year-old nanodiamond-rich soil
Posted on 01/02/2009 10:44:35 AM PST by Red Badger
Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team.
These nanodiamonds, which are produced under high-temperature, high-pressure conditions created by cosmic impacts and have been found in meteorites, are concentrated in similarly aged sediments at Murray Springs, Ariz., Bull Creek, Okla., Gainey, Mich., and Topper, S.C., as well as Lake Hind, Manitoba, and Chobot, Alberta, in Canada. Nanodiamonds can be produced on Earth, but only through high-explosive detonations or chemical vaporization.
Last year a 26-member team from 16 institutions proposed that a cosmic impact event, possibly by multiple airbursts of comets, set off a 1,300-year-long cold spell known as the Younger Dryas, fragmented the prehistoric Clovis culture and led to the extinction of a large range of animals, including mammoths, across North America. The team's paper was published in the Oct. 9, 2007, issue of the Proceedings of the National Academy of Sciences.
Now, reporting in the Jan. 2 issue of the journal Science, a team led by the University of Oregon's Douglas J. Kennett, a member of the original research team, report finding billions of nanometer-sized diamonds concentrated in sediments -- weighing from about 10 to 2,700 parts per billion -- in the six locations during digs funded by the National Science Foundation.
"The nanodiamonds that we found at all six locations exist only in sediments associated with the Younger Dryas Boundary layers, not above it or below it," said Kennett, a UO archaeologist. "These discoveries provide strong evidence for a cosmic impact event at approximately 12,900 years ago that would have had enormous environmental consequences for plants, animals and humans across North America."
The Clovis culture of hunters and gatherers was named after hunting tools referred to as Clovis points, first discovered in a mammoth's skeleton in 1926 near Clovis, N.M. Clovis sites later were identified across the United States, Mexico and Central America. Clovis people possibly entered North America across a land bridge from Siberia. The peak of the Clovis era is generally considered to have run from 13,200 to 12,900 years ago. One of the diamond-rich sediment layers reported sits directly on top of Clovis materials at the Murray Springs site.
News release on the 2007 paper is available here, with link to a copy of that paper.)
Diamond dust ping!..........
Glucosamine and carbonaceous chondrites.
Great for joint pain.
Thanks. It looks like the situation is well in hand.............
I take Glucosamine for $50, Alex..........
The same is true at the Topper site.
HA! More proof that CARBON KILLS! Ban all SUVs NOW!
The Clovis people left a humongous number of arrowheads across North America, and then just disappeared. Now we know why..........
Yes we need to destroy all carbon immediately. Outlaw it’s possession in any form. Make it a crime to transport it. Make it a crime to sell it. Make it a crime to consume it. Make carbon go away..................
Impossible. We know the earth is only 6007 years old, plus Noah’s Flood would have washed this all away.
So, let’s ignore this story.
“The Clovis people left a humongous number of arrowheads across North America, and then just disappeared. Now we know why..........”
Yes, I really miss Clovis Leadbetter. (grin)
Left wing nutcase! Left wing nutcase!.............
Yeah, it makes you wonder what the isotope ratio was in all that carbon that came raining down after the impact...and whether that has had any effects on C14 dating.
Scientists find signs of 13,000-year-old extinction event
Chicago Tribune | January 2, 2009 | Robert Mitchum
Posted on 01/01/2009 2:09:17 PM PST by neverdem
The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization
by Richard Firestone,
Allen West, and
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