Impact melt products as evidence for cosmic airbursts/impacts 12,900 years ago

PNAS (Proceedings of the National Academy of Sciences USA) ^ | 10 July 2012 | Ted Bunch et al.

[rjbemsha]

This paper supports the proposal that fragments of an asteroid or comet impacted Earth, deposited silica-and iron-rich microspherules and other proxies across several continents, and triggered the Younger Dryas cooling episode 12,900 years ago.

[rjbemsha]

The paper's results are consistent with cosmic ejecta, supporting the hypothesis of extraterrestrial airbursts/impacts 12,900 years ago. The wide geographic distribution of SLOs is consistent with multiple impactors.

[frithguild]

overlapping depressions with raised rims scattered across the Atlantic Coastal Plain from New Jersey to Alabama

I never knew this hypothesis was out there. Thanks for posting.

[Mike Darancette]

It would seem that potentially catastrophic strikes are more common than previously believed. We’ve been lucky the last 2,000 years.

[ProtectOurFreedom]

Perhaps Obama shouldn't be taking the lead on battling space aliens. Instead, we should let them pelt us with large extraterrestrial objects to further cool the planet.

For the latest news on how the Obama campaign is ready to battle space aliens, see Poll May Lead to Campaign Strategy Shift.

[The Antiyuppie]

“It would seem that potentially catastrophic strikes are more common than previously believed. We’ve been lucky the last 2,000 years”

It might be that they happen more often, but not in places where they would be noticed. If the Tunguska 1908 hit took place in a populated area...it would have been “bad”. And maybe 70% of the Earth surface is water, and a lot of that is in the middle of nowhere (the South Pacific). Maybe some tsunamis of the past in that area were caused by comets or meteors.

[TWhiteBear]

very interesting article.
The science seems sound as I would expect anything appearing in the Proceedings of the National Academy of Sciences to be.
These impacts probably wiped out the Clovis people.
TWB

[Yollopoliuhqui]

the neo-Velikovskians have been the object of ridicule and suppression for attempting to put this case for recent (historic times) celestial catastrophe before the mainstream scientific community during the past 20 years. Ancient mythology from around the world, in its essential form, has the story of the destruction of the Earth as its primary focus, with subsequent myth as a spin off of this actual event. Richard Firestone’s evidence makes this episode responsible for wiping out almost all life on the North American continent and the end of an ice age.

With all forms of archaeological dating based upon half-life radioactive decay, a yardstick that is now known to be modifiable in high energy plasma discharges, these events may one day be dated to a far more recent time, in the 4k - 5k year old bracket.

www.thunderbolts.info
http://sites.google.com/site/dragonstormproject/
www.holoscience.com
http://cosmictusk.com/clovis-population-decline-at-younger-dryas
http://www.knowledge.co.uk/sis/resource.htm

[rjbemsha]

Histories report a few apparently catastrophic events that may have an airburst component. For example, Thomas Short reports the destruction of Antioch on 22 Oct 105. Part of his description reads: “...then came thunder and lightning, which made the night like noon-day; ... the sea raged and roared; then came an intolerable heat, that men stripped, and hid themselves underground; the sky dark, and the air so full of dust, that one could not see another....”

The date seems questionable to me; Short may have been copying a description of the “sudden fire all over Antioch” of Oct 525. Maybe his hand slipped and he wrote “October 105” instead of “October 525.”

Anyway, ancient histories do contain scattered reports that may describe local catastrophic events.

[SunkenCiv]

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The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization by Richard Firestone, Allen West, and Simon Warwick-Smith

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[SunkenCiv]

Thanks ForGod'sSake for the link to this topic, and thanks rjbemsha for posting it. Additional:

• Younger Dryas -- The Rest of the Story!
• The Intriguing Problem Of The Younger Dryas -- What Does It Mean And What Caused It?
• Comet May Have Collided With Earth 13,000 Years Ago(MEXICO)
• Clovis Comet Gets Second Look
• New evidence supporting extraterrestrial impact at the start of the Younger Dryas
• Hour-long hailstorm may have caused 1,000-year freeze, say scientists
• Did a Comet Hit Earth 12,000 Years Ago?

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[SunkenCiv]

GGG managers are SunkenCiv, StayAt HomeMother & Ernest_at_the_Beach	join list or digest view topics view or post blog bookmark post a topic subscribe
Thanks ForGod'sSake for the link to this topic, and thanks rjbemsha for posting it. Additional: Younger Dryas -- The Rest of the Story! The Intriguing Problem Of The Younger Dryas -- What Does It Mean And What Caused It? Comet May Have Collided With Earth 13,000 Years Ago(MEXICO) Clovis Comet Gets Second Look New evidence supporting extraterrestrial impact at the start of the Younger Dryas Hour-long hailstorm may have caused 1,000-year freeze, say scientists Did a Comet Hit Earth 12,000 Years Ago? Just adding to the catalog, not sending a general distribution. To all -- please ping me to other topics which are appropriate for the GGG list.

[SunkenCiv]

From the FRchives:

• Comet May Have Collided With Earth 13,000 Years Ago (MEXICO)
• Younger Dryas -- The Rest of the Story!
• The Intriguing Problem Of The Younger Dryas -- What Does It Mean And What Caused It?
• Humans Did Not Kill Off Mammoths; Comet, Climate Change Helped, Studies Show
• Clovis Comet Gets Second Look
• New evidence supporting extraterrestrial impact at the start of the Younger Dryas
• How Mammoths Lost The Extinction Lottery
• Plasma, Solar Outbursts, and the End of the Last Ice Age
• Scientists reveal a first in Ice Age art
• Comet Theory Comes Crashing to Earth
• No evidence for Clovis comet catastrophe, archaeologists say
• Mammoth-killing space blast 'off the hook'
• True causes for extinction of cave bear revealed
• Woolly mammoth extinction 'not linked to humans'
• Los Angeles oil history runs deep
• Answer to what ended the last ice age may be blowing in the winds, paper says
• Fungi, Feces Show Comet Didn't Kill Ice Age Mammals?
• Methane Extinctions - Could this Explain the Carolina Bays?
• As Mammoths Died Out, Earth Chilled (mammoth burp and fart levels dropped, contribut
• New Study Reveals Link Between 'Climate Footprints' and Mass Mammal Extinction
• Comet trail may have caused last ice age - UPI.com
• Hour-long hailstorm may have caused 1,000-year freeze, say scientists
• Musk Ox Population Decline Due to Climate, Not Humans, Study Finds
• Cave reveals Southwest's abrupt climate swings during Ice Age
• The Death Star (Supernova close to Earth - could wipe us out)
• T Pyxidis Soon To Be A Type Ia Supernova
• Explosive Nearby Star Could Threaten Earth
• Kansas scientists probe mysterious possible comet strikes on Earth
• Big freeze plunged Europe into ice age in months
• Sophisticated hunters not to blame for driving mammoths to extinction
• Extinction of Giant Mammals Changed Landscape Dramatically
• Prehistoric man, giant animal coexisted
• Starvation 'wiped out' giant deer
• Car-Sized Creature Whacked with Tail's Sweet Spot (until 10,000 years ago)
• Mini ice age took hold of Europe in months
• North America comet theory questioned
• Carolina bays gouged into the ground at a magnetic reversal
• Did a Comet Cause a North American Die-Off around 13,000 Years Ago?
• Humans to Blame for Extinction? - Not Necessarily So ...
• Laser mapping may help solve the mystery of the Mima Mounds
• Mammoths wiped out by 'perfect storm?'
• Did a Comet Hit Earth 12,000 Years Ago?
• Six North American sites hold 12,900-year-old nanodiamond-rich soil
• Diamonds Linked to Quick Cooling Eons Ago
• Scientists say comet killed off mammoths, saber-toothed tigers
• Scientists find signs of 13,000-year-old extinction event
• Mammoth Mystery: The Beasts' Final Years
• Tracking down abrupt climate changes (Rapid natural climate change 12,700 years ago)
• First Humans To Settle Americas Came From Europe, Not From Asia Over Bering Strait -
• Diamonds Rained Down During Ice Age ($$$)
• Diamonds Rained Down During Ice Age
• First Humans To Settle Americas Came From Europe, Not From Asia....
• Exploding Asteroid Theory Strengthened By New Evidence Located In Ohio, Indiana
• Research Casts New Light On History Of North America
• Life Survived Catastrophic Space Rock Impact [Chesapeake Bay area]
• The mysterious forest rings of northern Ontario
• Al Goodyear And The Secrets Of Ancient Americans
• Did Comets Cause Ancient American Extinctions?
• Great beasts peppered from space
• The End of Eden: The Comet That Changed Civilization
• Site Provides Evidence For Ancient Comet Explosion (Topper - SC)
• Evidence for an extraterrestrial impact 12,900 years ago
• Cosmic blast may have killed off megafauna: Scientists say early humans doomed, too
• Cosmic blast may have killed off megafauna: Scientists say early humans doomed, too
• Research Team Says Extraterrestrial Impact To Blame For Ice Age Extinctions (More)
• NSF Press Release: Comet May Have Exploded Over North America 13,000 Years Ago
• Comet Theory Collides With Clovis Research, May Explain Disappearance of Ancient People
• Climate alarmists lose another piece of evidence
• Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)
• Comet May Have Doomed Mammoths
• Oregon Researchers Involved In New Clovis-Age Impact Theory (More)
• Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)
• Diamonds tell tale of comet that killed off the cavemen
• Did comet start deadly cold snap?
• Terrestrial Evidence of a Nuclear Catastrophe in Paleoindian Times
• Native Americans Recorded Supernova Explosion
• Scientist: Comets Blasted Early Americans
• Supernova Storm Wiped Out Mammoths?
• Supernova Storm Wiped Out Mammoths?
• Humans to Blame for Ice Age Extinctions, Study Says
• Deep freeze dealt death knell to bison (Ice Age)
• Supernova debris found on Earth
• The Pleistocene Extinction
• Ancient Atomic Warfare - Religious texts and geological evidence
• What killed the mammoths and other behemoths?