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Earlier global warming produced a whole new form of life
Date:10/22/2008

ur new study, we discovered the magnetofossils first without knowing the organism."

This species of microorganism, explained Vali, lived during a period of abrupt global warming known as the Paleocene-Eocene Thermal Maximum (PETM), when worldwide temperatures rose by 5 to 6 C over a period of 20,000 years.

"What's very interesting is that we know the very specific time frame when these organisms existed," he said. "If you go below it, we don't find them, and if you go above it, we don't find them. Five degrees warmer may not seem like much, but there was much more iron available due to increased weathering. The additional iron is required for the microorganism to produce the giant magnetofossils. It is clear that a similar abrupt global warming climatic event could have a severe impact upon our biosphere."


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Contact: Mark Shainblum
mark.shainblum@mcgill.ca
514-398-2189
McGill University
Source:Eurekalert

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