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Ice core data supports ancient space impact idea (cosmic impact about 12,900 years ago?)
BBC News ^ | 8/1/13 | Simon Redfern

Posted on 08/01/2013 3:35:01 PM PDT by NormsRevenge

New data from Greenland ice cores suggest North America may have suffered a large cosmic impact about 12,900 years ago.

A layer of platinum is seen in ice of the same age as a known abrupt climate transition, US scientists report.

The climate flip has previously been linked to the demise of the North American "Clovis" people.

The data seem to back the idea that an impact tipped the climate into a colder phase, a point of current debate.

Rapid climate change occurred 12,900 years ago, and it is proposed that this is associated with the extinction of large mammals such as the mammoth, widespread wildfires, and rapid changes in atmospheric and ocean circulation.

All of these have previously been linked to a cosmic impact, but the theory has been hotly disputed due to lack of clear evidence.

New platinum measurements were made on ice cores that allow conditions 13,000 years ago to be determined at a time resolution of better than five years, report Michail Petaev and colleagues from Harvard University. Their results are published in the journal Proceedings of the National Academy of Sciences.

A 100-fold spike in platinum concentration occurs in ice that is around 12,890 years old, at just the same moment that rapid cooling of the climate is indicated from oxygen isotope measurements, at the start of a climatic period called the "Younger Dryas".

(Excerpt) Read more at bbc.co.uk ...


TOPICS: Chit/Chat; Science; Weather
KEYWORDS: catastrophism; cosmic; data; davidmeltzer; godsgravesglyphs; greenland; icecore; impact; space

1 posted on 08/01/2013 3:35:01 PM PDT by NormsRevenge
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To: NormsRevenge

“It has been suggested that debris thrown into the atmosphere in an impact tipped the Earth into global cooling at a rate as rapid as the global changes in climate in the reverse direction seen in the last century.”

I call a greentard BS alert.


2 posted on 08/01/2013 3:48:06 PM PDT by Slambat
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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


3 posted on 08/01/2013 6:07:53 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: NormsRevenge; 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; ...

Thanks NormsRevenge.


4 posted on 08/01/2013 6:07:57 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: StayAt HomeMother; Ernest_at_the_Beach; decimon; 1010RD; 21twelve; 24Karet; 2ndDivisionVet; ...

Thanks NormsRevenge.

5 posted on 08/01/2013 6:08:00 PM PDT by SunkenCiv (It's no coincidence that some "conservatives" echo the hard left.)
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To: SunkenCiv

Interesting time frame...hmmmm...


6 posted on 08/01/2013 6:25:15 PM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both.)
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To: Slambat

——— no impact site has been identified.———

Then there is that statement.

The theory is interesting and something apparently did in fact happen but........ no smoking gun


7 posted on 08/02/2013 4:29:27 AM PDT by bert ((K.E. N.P. N.C. +12 ..... Travon... Felony assault and battery hate crime)
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To: NormsRevenge

I read somewhere that we get a major hit about once every 10,000 years (on average) and that is has been almost 13,000 since the last major one

All these recent hits have me a bit worried- we could be going through a ‘patch’ of space that has a bunch- we DID just cross the galactic plane, after all.


8 posted on 08/02/2013 11:23:31 AM PDT by Mr. K (Lies, Damned Lies, and Statistics, and then Democrat Talking Points.)
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To: bert

would something that size leave much of a crater if it was an ocean hit?


9 posted on 08/02/2013 11:24:31 AM PDT by Mr. K (Lies, Damned Lies, and Statistics, and then Democrat Talking Points.)
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To: Mr. K

Don’t you watch the doomsday movies. We are fortunate to have Bruce Willis on hand to go up in space and destroy any nasty asteroid that bothers us.

Well, Bruce is getting a little up in years, but Mark Wahlberg is almost ubiquitous in the movies these days so we should be in good hands. Give him a giant laser sniper rifle and a space station to fire from and we’re good.


10 posted on 08/03/2013 6:54:21 AM PDT by wildbill
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