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Did a Comet Cause a North American Die-Off around 13,000 Years Ago?
Scientific American ^ | July 20, 2009 | Brendan Borrell

Posted on 07/23/2009 7:00:35 PM PDT by SunkenCiv

Researchers have found shock-synthesized hexagonal diamonds on one of California's Channel Islands, which they say is the strongest evidence yet that a comet exploded in the atmosphere above North America, causing widespread extinctions there around 12,900 years ago... In 2007 researchers theorized that a comet set off continental fires that led to the mysterious disappearance of the Clovis people and the extermination of 35 mammal genera, including mammoths, mastodons, ground sloths and camels. The team documented a "black mat" of charcoal throughout North America that contains high levels of iridium, magnetic spheres, and nano-diamonds, which are consistent with such an airburst. The controversial theory also gibes with the 1908 Tunguska atmospheric detonation (also thought to be from a comet or meteorite) that leveled trees in Siberia, and it echoes the extraterrestrial impact widely believed to have wiped out the dinosaurs 65 million years ago.

Today, in Proceedings of the National Academy of Sciences, the same team reports on shock-synthesized hexagonal diamonds, known only from meteorite and other impact events, in a soot layer from Arlington Canyon on Santa Rosa Island in California. The canyon is famous for containing the earliest human remains in North America, dating back to 13,000 years, and the soot layer coincides with the disappearance of the pygmy mammoth from the island. In a documentary shown earlier this year on the Public Broadcasting Service's NOVA science show, the team also claimed that they discovered similar diamonds from the Greenland Ice Sheet dating to the same period.

What does the research team have to say about their doubters? "I'm so skeptical about the skeptics," says marine geologist James Kennett of the University of California, Santa Barbara. "We work in a different paradigm where different materials result from different kinds of impacts."

(Excerpt) Read more at scientificamerican.com ...


TOPICS: Astronomy; History; Science; Travel
KEYWORDS: catastrophism; clovis; clovisculture; comet; creation; diamonds; evolution; godsgravesglyphs; hexagonalnanodiamond; lonsdaleite; nanodiamonds; pygmymammoth
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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization

by Richard Firestone,
Allen West, and
Simon Warwick-Smith


1 posted on 07/23/2009 7:00:35 PM PDT by SunkenCiv
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To: 75thOVI; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; BBell; ...
It's been a while since we had dozens of topics about this, seems like two in one week is appropriate.
 
Catastrophism
· join · view topics · view or post blog · bookmark · post new topic ·

2 posted on 07/23/2009 7:02:02 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 21twelve; 24Karet; 2ndDivisionVet; 31R1O; ...

· join list or digest · view topics · view or post blog · bookmark · post a topic ·

 
Gods
Graves
Glyphs
It's been a while since we had dozens of topics about this, seems like two in one week is appropriate.

To all -- please ping me to other topics which are appropriate for the GGG list.
GGG managers are SunkenCiv, StayAt HomeMother, and Ernest_at_the_Beach
 

·Dogpile · Archaeologica · ArchaeoBlog · Archaeology · Biblical Archaeology Society ·
· Discover · Nat Geographic · Texas AM Anthro News · Yahoo Anthro & Archaeo · Google ·
· The Archaeology Channel · Excerpt, or Link only? · cgk's list of ping lists ·


3 posted on 07/23/2009 7:02:35 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: SunkenCiv

No, George Bush did. Ask Odumbo, he inherited it.


4 posted on 07/23/2009 7:03:16 PM PDT by Mr. Jazzy ("I AM JIM THOMPSON!!!")
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To: SunkenCiv

No, actually I believe it was due to an early Cro-Magnon man named Al-a-Goric.


5 posted on 07/23/2009 7:03:21 PM PDT by kempster
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To: SunkenCiv

It would make more sense for us to develop the technology to detect and deflect comets and asteroids than to go back to the Moon or Mars.


6 posted on 07/23/2009 7:06:10 PM PDT by Moonman62 (The issue of whether cheap labor makes America great should have been settled by the Civil War.)
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To: SunkenCiv
Did a Comet Cause a North American Die-Off around 13,000 Years Ago?

How would I know?

7 posted on 07/23/2009 7:08:38 PM PDT by the invisib1e hand (The revolution IS being televised.)
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To: SunkenCiv

Ruminant grazers survived the extinction, non-ruminants were wiped out.

You need a theory to accomodate this.


8 posted on 07/23/2009 7:09:40 PM PDT by Snickering Hound
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To: SunkenCiv

One little problem..... The end of the American megafauna also involved whatever created the gigantic muck deposits in the North and it’s not even obvious to me that a worldwide flood could do that, much less any sort of interaction with a comet.


9 posted on 07/23/2009 7:12:33 PM PDT by wendy1946
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To: SunkenCiv

10 posted on 07/23/2009 7:13:32 PM PDT by JoeProBono (A closed mouth gathers no feet)
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To: SunkenCiv

No it was a GREAT BIG FLOOD about 6,000 years ago.


11 posted on 07/23/2009 7:13:54 PM PDT by US Navy Vet
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To: kempster

Silly comet theory. It’s CAVEMAN’S FAULT. Those damn SUV’S they drove caused global warming.


12 posted on 07/23/2009 7:21:18 PM PDT by max americana
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To: Snickering Hound

Why do *I* need one?


13 posted on 07/23/2009 7:24:44 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: wendy1946

Gigantic muck deposits? I live maybe twenty miles from the muck farms, which are flat, former lakebeds, which have of course long been empty of the lake waters.


14 posted on 07/23/2009 7:26:23 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: Moonman62

I wholeheartedly agree.


15 posted on 07/23/2009 7:26:38 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: max americana
Global Warming - so simple a caveman can do it!

Geico insurance AlgoreCo offset credits

16 posted on 07/23/2009 7:33:18 PM PDT by 1ofmanyfree ((No jobs, licenses,mortgages,bank accounts or amnesty for any illegal alien criminals ! ))
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To: SunkenCiv
Why do *I* need one?

I meant it as a plural "you" for apocalyptic scientists.

Physicists that come up with this stuff really need to hang around animals more.

17 posted on 07/23/2009 7:36:19 PM PDT by Snickering Hound
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To: SunkenCiv

First things first.

Where was Ted Kennedy when this happened and can he prove his wherabouts?


18 posted on 07/23/2009 7:41:53 PM PDT by cripplecreek (Seniors, the new shovel ready project under socialized medicine.)
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To: KevinDavis

Space PING


19 posted on 07/23/2009 7:42:58 PM PDT by Thunder90
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To: SunkenCiv

It seems pretty likely that’s what happened. And during an ice age, so that explains the lack of crater. There’s a whole layer of nanodiamonds right around that time period.


20 posted on 07/23/2009 7:43:52 PM PDT by mysterio
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To: cripplecreek

I don’t think it was Kennedy. If an Oldsmobile had been involved instead of a Comet...


21 posted on 07/23/2009 7:50:53 PM PDT by Richard Kimball (We're all criminals. They just haven't figured out what some of us have done yet.)
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To: Richard Kimball
Did a Comet Cause a North American Die-Off around 13,000 Years Ago?

No, universal health care caused it.

22 posted on 07/23/2009 7:59:37 PM PDT by kaboom
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To: SunkenCiv
Wow!

I think that we're series screwed!

13000 years ago - a cataclysm

6200 years ago a giant Flood

We're seriously overdue for global warming to wipe out humanity!!

The Horror of it all!

23 posted on 07/23/2009 8:05:47 PM PDT by aShepard ("OK Class: repeat after me: "BUSH BAD- OBAMA SAVIOR OF MANKIND")
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To: cripplecreek
Where was Ted Kennedy when this happened and can he prove his whereabouts?

Diving off the bridge at Chappaquiddick, searching for Barack Obama's Birth Certificate! Mary Jo would be willing to testify, but, uh, well, that's another story.

24 posted on 07/23/2009 8:23:12 PM PDT by night reader (NRA Life Member since 1962)
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To: SunkenCiv
" ...the strongest evidence yet that a comet exploded in the atmosphere above North America, causing widespread extinctions there around 12,900 years ago..."

Yet it still didn't cause as much damage as Obama has in five months.

25 posted on 07/23/2009 8:30:22 PM PDT by noiseman (The only thing necessary for the triumph of evil is for good men to do nothing.)
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To: SunkenCiv

can you add me to your ping list? I love the study of history...

and where are these muck farms in MI?


26 posted on 07/23/2009 8:47:07 PM PDT by stefanbatory (Weed out the RINOs! see if they have signed the pledge. conservativepledge.org)
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To: noiseman

It was Jenny Granholm....that turd is the ICE QUEEN !!!


27 posted on 07/23/2009 8:47:13 PM PDT by Michigan Bowhunter (Democrat socialist liberal scumbags.....how did we let this happen!)
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To: SunkenCiv

What’s a muck farm, and where in North America are they?


28 posted on 07/23/2009 8:47:14 PM PDT by married21
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To: SunkenCiv

Almost certainly yes.


29 posted on 07/23/2009 9:13:26 PM PDT by djf (Man up! Don't be a FReeloader! Make a donation today!)
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To: SunkenCiv

And I’m fairly convinced it wasn’t just an air burst, that there was a ground impact.

It would explain the Carolina Bays.


30 posted on 07/23/2009 9:16:26 PM PDT by djf (Man up! Don't be a FReeloader! Make a donation today!)
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To: SunkenCiv
"The canyon is famous for containing the earliest human remains in North America, dating back to 13,000 years, and the soot layer coincides with the disappearance of the pygmy mammoth from the island."

We have that covered here:

'Arlington Springs Woman', 13,000 Years Old Human Skeleton, California Island

31 posted on 07/23/2009 9:33:38 PM PDT by blam
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To: married21
Muck Farms

I don't know what they have to do with this article.

32 posted on 07/23/2009 9:38:33 PM PDT by blam
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To: wendy1946; SunkenCiv

Muck, lotsa muck!

IN ALASKA, to the north of Mount McKlnley, the tallest
mountain in North America, the Tanana River joins the
Yukon. From the Tanana Valley and the valleys of its
tributaries gold is mined out of gravel and “muck.*’ This
muck is a frozen mass of animals and trees.

F. Rainey of the University of Alaska described the
scene: l “Wide cuts, often several miles in length and
sometimes as much as 140 feet in depth, are now being
sluiced out along stream valleys tributary to the Tanana
in the Fairbanks District. In order to reach gold-bearing
gravel beds an overburden of frozen silt or ‘muck’ is
removed with hydraulic giants. This 4 muck’ contains
enormous numbers of frozen bones of extinct animals
such as the mammoth, mastodon, super-bison and
horse.” 2

These animals perished in rather recent times; present
estimates place their extinction at the end of the Ice Age
or in early post-glacial times. The soil of Alaska covered
their bodies together with those of animals of species still
surviving.

1 F. Rainey. “Archaeological Investigation in Central Alaska,” Ameri-
can Antiquity, V (1940), 305.

2 The horse became extinct hi pre-Columbian America; the present
horses in the Western Hemisphere are descendants of imported animals.

1

2 IN THE NORTH

Under what conditions did this great slaughter take
place, in which millions upon millions of animals were
torn limb from limb and mingled with uprooted trees?

F. C. Hibben of the University of New Mexico writes:
“Although the formation of the deposits of muck is not
clear, there is ample evidence that at least portions of this
material were deposited under catastrophic conditions.
Mammal remains are for the most part dismembered and
disarticulated, even though some fragments yet retain,
in their frozen state, portions of ligaments, skin, hair,
and flesh. Twisted and torn trees are piled in splintered
masses. ... At least four considerable layers of volcanic
ash may be traced in these deposits, although they are
extremely warped and distorted. . . .” 3

http://www.archive.org/stream/earthupheaval010880mbp/earthupheaval010880mbp_djvu.txt


33 posted on 07/23/2009 11:29:07 PM PDT by Fred Nerks (fair dinkum!)
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To: Fred Nerks; SunkenCiv

I noted that the muck deposits indicate some sort of a gigantic process for which even a global flood might not suffice as a cause. Dwardu Cardona has proposed a radical explanation for them and that involves the Birkland currents associated with the antique solar system.


34 posted on 07/24/2009 1:44:15 AM PDT by wendy1946
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To: wendy1946

FROM THE SAME LINK:

EARTH IN UPHEAVAL

Georges Cuvier, the great French paleontologist (1769-
1832), thought that in a vast catastrophe of continental
dimensions the sea overwhelmed the land, the herds of
mammoths perished, and in a second spasmodic move-
ment the sea rushed away, leaving the carcasses behind.
This catastrophe must have been accompanied by a pre-
cipitous drop in temperature; the frost seized the dead
bodies and saved them from decomposition. In some
mammoths, when discovered, even the eyeballs were still
preserved.

Charles Darwin, who denied the occurrence of con-
tinental catastrophes in the past, in a letter to Sir Henry Howorth admitted that the extinction of mammoths in
Siberia was for him an insoluble problem. J. D. Dana,
the leading American geologist of the second half of the
last century, wrote: “The encasing in ice of huge elephants, and the perfect preservation of the flesh, shows that the cold finally became suddenly extreme, as of a single winter’s night, and knew no relenting afterward.”


35 posted on 07/24/2009 3:54:27 AM PDT by Fred Nerks (fair dinkum!)
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To: SunkenCiv

Did a Comet Cause a North American Die-Off around 13,000 Years Ago?

Ask Helen Thomas, she was there...
36 posted on 07/24/2009 4:17:36 AM PDT by COBOL2Java (Big government more or less guarantees rule by creeps and misfits.)
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To: SunkenCiv; blam; Snickering Hound; cripplecreek

This site is close to us. (Leanderthal Lady site)

Were they here before or after the dieoff?

http://www.texasbeyondhistory.net/plateaus/images/ap5.html

http://www.texasbeyondhistory.net/plateaus/prehistory/images/leannes.html


37 posted on 07/24/2009 11:14:00 AM PDT by wolfcreek (KMTEXASA!)
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To: wolfcreek

Excellent. Thanks for the input.


38 posted on 07/24/2009 11:37:00 AM PDT by blam
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To: SunkenCiv

The evidence seems to be piling up that this event happened. What seems uncertain is whether the comet made it to the ground or exploded in the air.


39 posted on 07/24/2009 1:44:32 PM PDT by colorado tanker ("Ah guess I talked stupidly when I said the officer acted stupidly.")
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To: colorado tanker

...or both — it seems reasonable that multiple chunks arrived, striking in different places over a short period of time.


40 posted on 07/24/2009 5:47:44 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: stefanbatory

Heh... they don’t actually *grow* muck in them... the soil is a really dark black rich looking soil, and is great for various low crops (beets, sugar beets, carrots, etc, but also shrub farming, lots of stuff) and the fields tend to be dead flat level. :’)

Welcome to the GGG list. :’) I’ll send the official message in FReepmail.


41 posted on 07/24/2009 5:56:08 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: mysterio

Yeah, the way the impact location was figured out helps make the case compelling.


42 posted on 07/24/2009 6:00:05 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: Snickering Hound

They’ve hung around some extinct ones, namely mammoths, and evidence was right in the bones and tusks.


43 posted on 07/24/2009 6:01:11 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: djf

I highly recommend the book (above) and believe you will enjoy it.


44 posted on 07/24/2009 6:04:23 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: noiseman; kaboom; aShepard; Mr. Jazzy; kempster; the invisib1e hand; max americana; cripplecreek; ..

:’D


45 posted on 07/24/2009 6:05:07 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: SunkenCiv

Which one?


46 posted on 07/24/2009 6:08:03 PM PDT by djf (The "racism" spiel is a crutch, and those who drone on about it are cripples...)
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To: SunkenCiv

Oh, ok, I got ya!


47 posted on 07/24/2009 6:08:55 PM PDT by djf (The "racism" spiel is a crutch, and those who drone on about it are cripples...)
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To: SunkenCiv
Good point.

Sure glad I wasn't around when that thing hit.

48 posted on 07/24/2009 6:14:13 PM PDT by colorado tanker ("Ah guess I talked stupidly when I said the officer acted stupidly.")
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To: wolfcreek; Fred Nerks

Thanks!


49 posted on 07/24/2009 6:21:04 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/__Since Jan 3, 2004__Profile updated Monday, January 12, 2009)
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To: SunkenCiv
You know, this will happen again. There is no way of knowing when but it will happen again. What bothers me is liberals have the arrogance to believe mankind will be the villain in ending life as we know it. They are to stupid too understand we are all living on borrowed time. An asteroid could and will end it at anytime. We live in a very violent universe.
50 posted on 07/24/2009 6:22:00 PM PDT by kempo
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