19 Feb '12, 4pm

Global Extinction: Gradual Doom as Bad as Abrupt

Global Extinction: Gradual Doom as Bad as Abrupt

Global Extinction: Gradual Doom as Bad as Abrupt Posted on 20 February 2012 by John Hartz This is a reprint of a press release posted by the National Science Foundation on Feb 3, 2012. In "The Great Dying" 250 million years ago, the end came slowly The geology of Griesbach Creek in the Arctic tells an ancient tale of slow extinction. Credit and Larger Version The deadliest mass extinction of all took a long time to kill 90 percent of Earth's marine life--and it killed in stages--according to a newly published report. It shows that mass extinctions need not be sudden events. Thomas Algeo, a geologist at the University of Cincinnati, and 13 colleagues have produced a high-resolution look at the geology of a Permian-Triassic boundary section on Ellesmere Island in the Canadian Arctic. Their analysis, published today in the Geological Society of America Bulletin , provides str...

Full article: http://www.skepticalscience.com/news.php?n=1284

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