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Ancient meteorite impact triggered highest surface temperature in Earth's history

Postby MrFredPFL » Wed Sep 20, 2017 8:58 pm

Story : https://www.upi.com/Science_News/2017/09/20/Ancient-meteorite-impact-triggered-h





Researchers have discovered evidence of an ancient meteorite impact, a collision scientists say is responsible for the highest temperature recorded on Earth's surface -- 2,370 degrees Celsius, or 4,298 degrees Fahrenheit.

The impact site, Mistastin Lake crater in Labrador Canada, stretches more than 17 miles across. The significant depression was created when a large meteor struck bedrock some 38 million years ago.

Aside from the topographical imprint, impacts leave little evidence of their existence behind. Both the meteor and the impacted bedrock are mostly vaporized by the collision.

At Mistastin Lake, a few rock fragments survived the crash. One of them was picked up in 2011 by Michael Zanetti, now a post-doctoral researcher in earth sciences at Western University in Ontario. At the time, Zanetti was working with NASA scientists on a mock moon mission funded by the Canadian Space Agency.







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