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NSF Press Release: Comet May Have Exploded Over North America 13,000 Years Ago
National Science Foundation Press Release ^ | August 14, 2007 | Cheryl Dybas, NSF

Posted on 08/15/2007 5:32:04 PM PDT by baynut

A "black mat" of algal growth in Arizona marks the extinction of mammoths 12,900 years ago

New scientific findings suggest that a large comet may have exploded over North America 12,900 years ago, explaining riddles that scientists have wrestled with for decades, including an abrupt cooling of much of the planet and the extinction of large mammals. The discovery was made by scientists from the University of California at Santa Barbara and their colleagues. James Kennett, a paleoceanographer at the university, said that the discovery may explain some of the highly debated geologic controversies of recent decades.

The period in question is called the Younger Dryas, an interval of abrupt cooling that lasted for about 1,000 years and occurred at the beginning of an inter-glacial warm period. Evidence for the temperature change is recorded in marine sediments and ice cores.

According to the scientists, the comet before fragmentation must have been about four kilometers across, and either exploded in the atmosphere or had fragments hit the Laurentide ice sheet in the northeastern North America.

Wildfires across the continent would have resulted from the fiery impact, killing off vegetation that was the food supply of many of larger mammals like the woolly mammoths, causing them to go extinct.

Since the Clovis people of North America hunted the mammoths as a major source of their food, they too would have been affected by the impact. Their culture eventually died out.

The scientific team visited more than a dozen archaeological sites in North America, where they found high concentrations of iridium, an element that is rare on Earth, and is almost exclusively associated with extraterrestrial objects such as comets and meteorites.

They also found metallic microspherules in the comet fragments; these microspherules contained nano-diamonds. The comet also carried carbon molecules called fullerenes (buckyballs), with gases trapped inside that indicated an extraterrestrial origin.

The team concluded that the impact of the comet likely destabilized a large portion of the Laurentide ice sheet, causing a high volume of freshwater to flow into the north Atlantic and Arctic Oceans.

"This, in turn, would have caused a major disruption of the ocean's circulation, leading to a cooler atmosphere and the glaciation of the Younger Dryas period," said Kennett. "We found evidence of the impact as far west as the Santa Barbara Channel Islands."

NSF's Paleoclimate Program funded the research.


TOPICS: Culture/Society; Miscellaneous; Philosophy
KEYWORDS: catastrophism; climate; clovis; clovisimpact; comet; extinction; godsgravesglyphs; impact
When will this science story get picked up by the major media? It's been bouncing around now for a while (since Plato) with increasing crediblity.
1 posted on 08/15/2007 5:32:09 PM PDT by baynut
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To: baynut

more info:
http://www.freerepublic.com/focus/search?m=all;o=time;s=Comet


2 posted on 08/15/2007 5:35:41 PM PDT by xcamel ("It's Talk Thompson Time!" >> irc://irc.freenode.net/fredthompson)
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To: baynut; blam

It is strange how it stays out on the fringe of reporting.


3 posted on 08/15/2007 5:38:00 PM PDT by Siobhan (America without God is dead.)
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To: baynut
Comets are not bombs. It is unlikely that one "exploded." (especially if they are composed of ice, as the conventional wisdom would have it.)

ML/NJ

4 posted on 08/15/2007 5:38:38 PM PDT by ml/nj
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To: baynut

...or it could have been the return of Planet X (3600 year cycles) as recorded by every major ancient civilization since the beginning of records....”wormwood” for you Fatima fans.....The “Red dragon” for you Asians.....”Niburu” for you Sumerian’s in da house....


5 posted on 08/15/2007 5:47:11 PM PDT by taxed2death (A few billion here, a few trillion there...we're all friends right?)
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To: ml/nj

> Comets are not bombs.

They are if they hit the atmosphere.
Ice to steam (or even plasma), instantly.

Tunguska (1908) may have been one.


6 posted on 08/15/2007 5:52:08 PM PDT by Boundless (Legacy Media is hazardous to your mental health)
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To: Boundless
Nonsense. Do you have any sort of scientific background? (FTR, I do.)

ML/NJ

7 posted on 08/15/2007 5:58:14 PM PDT by ml/nj
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To: baynut
Why isn’t this in the Breaking News section? /sarc
8 posted on 08/15/2007 5:59:15 PM PDT by Shqipo (Anonymous Sedition is a thriller of a read....)
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To: Boundless

Hypersonic speeds can turn just about any large object into a bomb.


9 posted on 08/15/2007 6:00:36 PM PDT by cripplecreek (Greed is NOT a conservative ideal.)
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To: ml/nj

3. Turn LEFT on CANEY RD go 1.1 mi 1.3 mi
4. Turn LEFT on BROOKWOOD RD go < 0.1 mi 1.3 mi
5. Turn RIGHT on PEACHTREE PKY(GA-141) go 1.9 mi 3.2 mi
6. Continue to follow GA-141 go 14.0 mi 17.2 mi
7. Take ramp onto I-285 E go 2.2 mi 19.4 mi
8. Continue on I-285 S go 13.0 mi 32.4 mi
9. Continue on I-285 W go 5.4 mi 37.8 mi
10. Take exit #52/MACON onto I-675 S go 11.4 mi 49.2 mi
11. Continue on I-75 S go 62.2 mi 111.4 mi
12. Take LEFT exit #165/SAVANNAH/JIM L GILLIS HWY onto I-16 E go 115.0 mi 226.4 mi
13. Take exit #116/STATESBORO/CLAXTON go 0.4 mi 226.8 mi
14. Turn RIGHT on US-25 S go 1.1 mi 227.9 mi
15. Continue on US-301 go 9.5 mi 237.4 mi
16. Turn RIGHT on E MAIN ST(US-280) go < 0.1 mi 237.4 mi
17. Continue to follow US-280 go 0.8 mi 238.2 mi
18. Arrive at 802 W MAIN ST, CLAXTON
802 W MAIN ST, CLAXTON, GA


10 posted on 08/15/2007 6:02:28 PM PDT by StructuredChaos
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To: baynut

Immanuel Velikovsky wrote many books about this in the 1950s and was treated as a nut by academia


11 posted on 08/15/2007 6:04:02 PM PDT by Saint Louis
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To: SunkenCiv; blam

Uh-Huh. another mammoth story.


12 posted on 08/15/2007 6:04:19 PM PDT by wildbill
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To: cripplecreek

I have a scientific background so let me elaborate on this. Now you have to first understand the origins then we will work up to the present.

According to Al Gore it was the Bush administrations failures to prevent global warming that caused this event 13,000 years ago.

Want proof? I have 500 UN science majors that will corroborate Al’s story.


13 posted on 08/15/2007 6:05:08 PM PDT by EQAndyBuzz (When O'Reilly comes out from under his desk, tell him to give me a call. Hunter/Thompson in 08.)
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To: ml/nj

Shoemaker Levy fragments caused explosions on Jupiter. Some of those explosions were larger than the earth.


14 posted on 08/15/2007 6:06:26 PM PDT by cripplecreek (Greed is NOT a conservative ideal.)
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To: ml/nj

Comets are not composed of ice. The science mafia came up with that kluge to explain away the enigma of the comet’s tail- had to be “evaporation” or sublimation of a liquid. Closeup satellite pictures have proven that comets are meteors/asteroids, yet the brahmins of orthodoxy in academia and the press idiotically continue to refer to comets as “dirty snowballs”. The comet tail is caused by plasma discharge due to charge difference between the meteor and the solar “wind”, which itself is really solar _charge_, an electric/plasma Birkland current. See: http://www.thunderbolts.info/

There is a good chance that the meteor in question did not impact the earth but was discharged before impact, blown apart by a large short circuit of lightning. The puzzling 1908 Siberian Tunguska event left a miniscule impact crater, yet forests for a radius of 60 miles were blown flat, registering on seismographs in Europe.

Contemporary science is a cesspool of ideology that routinely sacrifices direct observation on the altar of political correctness

More references:

http://www-th.bo.infn.it/tunguska/,
http://public.lanl.gov/alp/plasma/TheUniverse.html,
http://gallery.bcentral.com/Gallery/ProductListing.aspx?GID=4907389&Dept=215905,
http://www.knowledge.co.uk/sis/resource.htm,
http://www.holoscience.com/home/home.htm
http://www.kronia.com/


15 posted on 08/15/2007 6:09:56 PM PDT by Yollopoliuhqui (Dirty Snowball Idiocy)
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To: baynut
Women and Neanderthals Hardest Hit
16 posted on 08/15/2007 6:13:40 PM PDT by mikrofon (Comet News Network)
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To: baynut
Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)
17 posted on 08/15/2007 6:25:00 PM PDT by blam (Secure the border and enforce the law)
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To: Saint Louis
Immanuel Velikovsky wrote many books about this in the 1950s and was treated as a nut by academia.

I don't think Velikovsky is a nut. I'm not sure what book(s) of his you have in mind, maybe Worlds in Collision? But Venus didn't explode, in the Velikovsky scenario. What are you talking about?

ML/NJ

18 posted on 08/15/2007 6:30:59 PM PDT by ml/nj
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To: StructuredChaos
Is this like the St. Valentine's Day Massacre"?

ML/NJ

19 posted on 08/15/2007 6:32:16 PM PDT by ml/nj
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To: ml/nj

I thought it was Marduke that exploded / asteroid belt as the result.


20 posted on 08/15/2007 6:36:50 PM PDT by taxed2death (A few billion here, a few trillion there...we're all friends right?)
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To: baynut

Bush’s Fault for not signing the Kyoto Protocol, no doubt.


21 posted on 08/15/2007 9:27:48 PM PDT by JRios1968 (Faith is not believing that God can. It is knowing that God will. - Ben Stein)
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To: ml/nj
Comets are not bombs. It is unlikely that one "exploded." (especially if they are composed of ice, as the conventional wisdom would have it.)

Meteors are not bombs, either, but judging by the Tunguska event of 1908 and the Barringer crater, they explode just fine.

Get anything with mass going fast enough and it will always explode on meeting the denser part of our atmostphere.

22 posted on 08/15/2007 11:35:01 PM PDT by Publius6961 (MSM: Israelis are killed by rockets; Lebanese are killed by Israelis.)
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To: taxed2death
Planet "X"?

If it explodes every 3600 years they should call it Houdini...

Just saying...

23 posted on 08/15/2007 11:37:30 PM PDT by Publius6961 (MSM: Israelis are killed by rockets; Lebanese are killed by Israelis.)
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To: StructuredChaos

What does post refer to?


24 posted on 08/15/2007 11:48:26 PM PDT by JeffAtlanta
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To: Publius6961

It doesn’t explode every 3600 years, it passes through our inner solar system, causing an increase in volcanic and seismic activity due to it’s gravitational pull.


25 posted on 08/16/2007 4:39:40 AM PDT by taxed2death (A few billion here, a few trillion there...we're all friends right?)
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To: ml/nj

LOL, NO IT ISN’T. MY WIFE USED MY ACCOUNT TO SEND ME DIRECTIONS. BUT SHE TOOK SOME LIBERTIES. I TOLD HER NEXT TIME TO EMAIL IT TO MY HANDLE HERE.

SORRY ABOUT THAT


26 posted on 08/16/2007 6:14:00 AM PDT by StructuredChaos
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To: wildbill
Thanks wildbill. I wish they'd pachyderm and stick with it. [rimshot!]

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,
Simon Warwick-Smith


27 posted on 08/16/2007 9:05:13 AM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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To: Saint Louis; 75thOVI; AFPhys; Alice in Wonderland; AndrewC; aristotleman; Avoiding_Sulla; ...
 
Catastrophism
· join · view topics · view or post blog · bookmark · post new topic ·

28 posted on 08/16/2007 9:11:15 AM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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To: Yollopoliuhqui

It’s a shame we have never been able to study a comet in captivity. :p


29 posted on 08/16/2007 9:12:01 AM PDT by Some hope remaining.
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Did comet start deadly cold snap?
Canada.com | Monday, May 14, 2007 | Margaret Munro
Posted on 05/16/2007 6:00:33 PM EDT by Mike Darancette
http://www.freerepublic.com/focus/f-news/1834769/posts

Diamonds tell tale of comet that killed off the cavemen
Guardian | 5-20-07 | Robin McKie
Posted on 05/20/2007 7:50:33 PM EDT by Renfield
http://www.freerepublic.com/focus/f-news/1836898/posts

Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)
Live Science | 05/21/07 | Jeanna Bryner
Posted on 05/22/2007 1:16:48 AM EDT by TigerLikesRooster
http://www.freerepublic.com/focus/f-news/1837610/posts

Oregon Researchers Involved In New Clovis-Age Impact Theory (More)
Eureka Alert
Posted on 05/23/2007 5:30:19 PM EDT by blam
http://www.freerepublic.com/focus/f-news/1838660/posts

Comet May Have Doomed Mammoths
Red Orbit | 5-26-07 | Betsy Mason
Posted on 05/26/2007 9:12:53 AM EDT by Renfield
http://www.freerepublic.com/focus/f-news/1840136/posts

Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada?
(More) (Carolina Bays)
Science News | 6-1-2007 | Sid Perkins
Posted on 06/02/2007 6:14:23 PM EDT by blam
http://www.freerepublic.com/focus/f-news/1843831/posts

Comet Theory Collides With Clovis Research,
May Explain Disappearance of Ancient People
University of South Carolina(USC News) | June 28, 2007 | Staff
Posted on 08/04/2007 2:29:34 AM EDT by ForGod’sSake
http://www.freerepublic.com/focus/f-news/1876220/posts

Rare Meteor Shower To Shed Light On Dangerous Comets
New Scientist | 8-8-2007 | Stephen Battersby
Posted on 08/08/2007 6:08:54 PM EDT by blam
http://www.freerepublic.com/focus/f-news/1878374/posts


30 posted on 08/16/2007 9:22:36 AM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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To: baynut

bump


31 posted on 08/16/2007 9:23:32 AM PDT by VOA
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To: StructuredChaos
Arrive at 802 W MAIN ST, CLAXTON

... and buy a fruitcake!

32 posted on 08/16/2007 9:28:14 AM PDT by LTCJ
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To: blam; FairOpinion; StayAt HomeMother; Ernest_at_the_Beach
An update topic.

To all -- please ping me to other topics which are appropriate for the GGG list. Thanks.
Please FREEPMAIL me if you want on or off the
"Gods, Graves, Glyphs" PING list or GGG weekly digest
-- Archaeology/Anthropology/Ancient Cultures/Artifacts/Antiquities, etc.
Gods, Graves, Glyphs (alpha order)

33 posted on 08/16/2007 9:30:34 AM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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To: baynut
an inter-glacial warm period

Sounded like a fancy term for global warming, so I looked it up and yeah, it is a fancy term for global warming. I guess we wouldn't want to confuse people between real inter-glacial warm periods and AlGore's global warming "let's get rich off carbon credits" crisis.

34 posted on 08/16/2007 9:39:13 AM PDT by Elyse (I refuse to feed the crocodile.)
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To: StructuredChaos
Can I make a thread out of it?

"StucturedChaos gets Directions from Wife"

35 posted on 08/16/2007 2:39:47 PM PDT by KayEyeDoubleDee (const Tag &referenceToConstTag)
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To: Publius6961
Meteors are not bombs, either, but judging by the Tunguska event of 1908 and the Barringer crater, they explode just fine.

I'm wondering what definition of explode you would choose. No one really knows what happened at Tunguska, and Barringer is just an impact crater. When an airplane crashes into the ground and debris is scattered all over the place no one would suggest that an explosion occurred unless the event were accompanied by a rapid combustion of fuel. (oxidation or other exothermic reaction)

ML/NJ

36 posted on 08/16/2007 3:02:35 PM PDT by ml/nj
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To: StructuredChaos
LOL

Did you really understand the reference to "St. Valentine's Day Massacre"?

ML/NJ

37 posted on 08/16/2007 3:05:03 PM PDT by ml/nj
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To: baynut
I only hope there were no injuries...


38 posted on 08/16/2007 3:08:48 PM PDT by steveo (Time flies like an arrow, fruit flies like a banana.)
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To: Yollopoliuhqui; SunkenCiv; blam
The lightnings flashed and the thunders roared terribly and all were afraid. Then the heaven burst and the fragments fell down and killed everything and everybody. Heaven and earth changed places. Nothing that had life was left upon the earth.

from the tradition of the Cashinaua, the aborigines of western Brazil. Quoted by Bellamy, Moons, Myths and Man. p. 80.

39 posted on 08/16/2007 6:11:39 PM PDT by Fred Nerks (Fair dinkum!)
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To: Fred Nerks

Nice!


40 posted on 08/16/2007 10:11:32 PM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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Ancient Crash, Epic Wave
NY Times | November 14, 2006 | SANDRA BLAKESLEE
Posted on 11/14/2006 7:07:33 AM EST by Pharmboy
http://www.freerepublic.com/focus/f-news/1738251/posts

Did an Asteroid Impact Cause an Ancient Tsunami?
NYT | Nov 14 2006 | SANDRA BLAKESLEE
Posted on 11/15/2006 11:00:40 PM EST by djf
http://www.freerepublic.com/focus/f-news/1739396/posts


41 posted on 08/16/2007 10:26:12 PM PDT by SunkenCiv (Profile updated Tuesday, August 14, 2007. https://secure.freerepublic.com/donate/)
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To: baynut

You’ve been away for a while; welcome back.


42 posted on 08/18/2007 10:34:35 AM PDT by ForGod'sSake (ABCNNBCBS: An enemy at the gates is less formidable, for he is known and carries his banner openly.)
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To: baynut; All

The impact likely destabilized a large portion of the Laurentide Ice Sheet. Could this have been the outflooding of giant Lake Agazziz (sp?) which I understand happened about the same time?


43 posted on 09/07/2007 6:32:01 AM PDT by gleeaikin
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To: ml/nj; Boundless
Doing a bit of summary research on this "Younger Dryas" phenomenon and noticed your absurd comment re comet (non)explosions. If you are as scientifically astute as you claim to be, then how do you discount the explosive impacts of Comet Shoemaker-Levy on Jupiter?

(Source: http://www2.jpl.nasa.gov/sl9/gif/mosaic.gif )

44 posted on 01/01/2009 9:28:46 PM PST by TXnMA ("Allah": Satan's current alias...!!)
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To: buckrodgers

Ping


45 posted on 01/01/2009 9:31:17 PM PST by Straight Vermonter (Posting from deep behind the Maple Curtain)
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To: StructuredChaos

Soooo, THAT’s where the Fruit Cakes come from!


46 posted on 01/01/2009 9:33:24 PM PST by tet68 ( " We would not die in that man's company, that fears his fellowship to die with us...." Henry V.)
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To: KayEyeDoubleDee
Just the fact he had his wife get directions for him.......is ironic.

LOL

47 posted on 01/01/2009 9:34:45 PM PST by Thumper1960 (A modern so-called "Conservative" is a shadow of a wisp of a vertebrate human being.)
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To: Straight Vermonter

48 posted on 01/01/2009 9:35:15 PM PST by Straight Vermonter (Posting from deep behind the Maple Curtain)
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To: baynut

I have long thought that there was simply no chance man could wipe out the mammoth.

Hell, you could have put twenty times as many American Indian natives on the plains, and they would have barely made a dent in the bison herds.

It took two things they didn’t have.
Horses.
And guns.

Man making mammoths extinct?
Dream on.


49 posted on 01/01/2009 9:41:42 PM PST by djf (< Tagline closed until further notice. Awaiting bailout >)
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To: TXnMA
Doing a bit of summary research on this "Younger Dryas" phenomenon and noticed your absurd comment re comet (non)explosions.

I'm sure your research is impeccable, but I have no idea what you could be referring to. Please provide me with a link.

ML/NJ

50 posted on 01/02/2009 5:50:10 AM PST by ml/nj
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