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Steve Herschbach

Meteorite Crater Found Beneath Greenland’s Ice Sheet

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“A giant crater that was formed when a meteorite smashed into Earth, has been uncovered deep below Greenland’s ice sheets. The 31-kilometre-wide cavity was discovered by an international team of scientists who believe it was caused by a “rare” meteorite that struck Earth as recently as 12,000 years ago.

Evidence suggests the crater was formed when a kilometre-wide iron meteorite penetrated seven kilometres into the Earth’s crust. Since then it has been buried under the thick ice of the Hiawatha Glacier in northwest Greenland. It is the first time ever that an impact crater of any size has been found underneath one of Earth’s continental ice sheets.”

Click here for the rest of the story

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Here's the video on it

 

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12,000 to 3 million is quite a spread, but I suppose they'll soon have it pinned down.  Well, a bit larger and we wouldn't be around to worry about things...

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Here’s where a meterorite crashed down about 7-8 miles from where I live.  Wonder if the ground shook in my area when this baby hit??

https://www.thevintagenews.com/2018/04/10/tennessee-flynn-creek-crater/

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1 hour ago, Tnsharpshooter said:

Here’s where a meterorite crashed down about 7-8 miles from where I live.  Wonder if the ground shook in my area when this baby hit??

https://www.thevintagenews.com/2018/04/10/tennessee-flynn-creek-crater/

Most certainly.  In fact, that impact with the ground may not even have caused the largest shock wave.  Often, meteorites explode in the atmosphere before impact.  The 2013 Chelyabinsk meteorite was originally about 20 meters diameter; but it exploded miles up, leaving only relatively small pieces to impact the ground.  Even with the atmosphere absorbing most of the energy (500 kilo tons TNT), the shock wave broke thousands of windows in nearby towns and threw people off their feet.  On youtube, there are a bunch of interesting videos from dashcams and security cams. 

http://www.tulane.edu/~sanelson/Natural_Disasters/impacts.htm

 

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