The day the Earth nearly died
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University of Guelph *
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2240
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Geology
Date
Dec 6, 2023
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docx
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The day the Earth nearly died (Due M, Nov 27 by 11:59 pm)
Name________Russian Chen___________________1145966_________________________
https://www.dailymotion.com/video/xw5o16
1. Describe what happened on Earth at the end of Permian period.
Roughly 95% of all species on Earth vanished during a major extinction catastrophe that
occurred during the Permain epoch. The Permian epoch, which was defined by a notable
extinction of marine and terrestrial life and a profound shift in Earth's biodiversity, came to an
end with this catastrophe.
2.
What were the two explanations suggested by geologists for the end-of-Permian event and
why they did not hold?
Siberian Traps and a meteor impact were first suggested as the culprits. But the amount of
volcanic activity did not appear to be large enough to cause such a vast extinction, and there
was no proof of a major meteor impact from the Permian period, such as a crater.
3.
Describe the evidence from Greenland and its significance.
Studies conducted in Greenland showed that the extinction happened gradually over tens of
thousands of years rather than all at once. This result was essential to comprehending the slow
character of the extinction, as was the observation of a notable rise in carbon-12 in rocks.
4.
How did J. Dickens explain massive increase in C-12 in rocks at the end of Permian period?
J. Dickens connected the release of methane hydrates to the rise in carbon-12. According to his
theory, the ocean's methane hydrates were unstable due to rising temperatures, which caused a
significant amount of methane—rich in carbon-12—to be released into the atmosphere.
5.
What was the final explanation for the end-of-Permian event suggested by Dr. P. Wignall?
Dr. Paul Wignall proposed that the extinction was caused by various events, including early
warming from volcanic activity and later methane hydrate release. Global temperatures rose
sharply as a result, resulting in extensive ecosystem alterations and catastrophic extinctions.
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