The Great Permian Extinction

The Great Permian Extinction - The Great Permian Extinction...

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The Great Permian Extinction The cause (or causes) of the Permian extinction remain in dispute. 1. The Siberian Traps are a massive lava flow in eastern Asia that may have contributed to (or even caused) the Permian event by triggering a massive, sudden glaciation as well as other environmental consequences of volcanic eruptions. The period of greatest eruption in the traps coincides with the mass extinction. Ages of the lava flows suggest the traps formed over a one million year interval. The traps are near the city of Tura and also occur in Yakutsk, Noril'sk and Irkutsk, covering an area of slightly less than 2 million square kilometers (an area larger than Europe). The original volume of the traps is estimated at between 1 million and 4 million cubic km. 2. The Cretaceous-Tertiary extinction that marks the close of the Mesozoic era has been hypothesized as a result of a large meteor or comet strike. Evidence of a similar (and larger) impact at the close of the Permian is not strongly supported,
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This note was uploaded on 11/29/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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The Great Permian Extinction - The Great Permian Extinction...

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