My OperaPermian-Triassic Mass Extinction
Saturday, October 21, 2006 3:10:51 PM
The Permian-Triassic (P-T or PT) extinction event, sometimes informally called the Great Dying, was an extinction event that occurred approximately 251 million years ago, forming the boundary between the Permian and Triassic geologic periods. It was the Earth's most severe extinction event, with about 96 percent of all marine species and 70 percent of terrestrial vertebrate species becoming extinct.
What caused the largest mass extinction in Earth's history?
A leading theory for the P-T extinction is, that a warming of the earth and a slowdown in ocean circulation made it harder to replace the oxygen sucked out of the water by marine organisms. According to the theory, microbes would have saturated the water with hydrogen sulfide, a highly toxic chemical.
USC earth scientists will reveal new clues at ]the annual meeting of the Geological Society of America in Philadelphia October 22-25 2006.
Relevant abstract at http://gsa.confex.com/gsa/2006AM/finalprogram/abstract_115465.htm
EurekAlert of 20 October 2006 at http://www.eurekalert.org/pub_releases/2006-10/uosc-mec102006.php
What caused the largest mass extinction in Earth's history?
A leading theory for the P-T extinction is, that a warming of the earth and a slowdown in ocean circulation made it harder to replace the oxygen sucked out of the water by marine organisms. According to the theory, microbes would have saturated the water with hydrogen sulfide, a highly toxic chemical.
USC earth scientists will reveal new clues at ]the annual meeting of the Geological Society of America in Philadelphia October 22-25 2006.
Relevant abstract at http://gsa.confex.com/gsa/2006AM/finalprogram/abstract_115465.htm
EurekAlert of 20 October 2006 at http://www.eurekalert.org/pub_releases/2006-10/uosc-mec102006.php
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