( tained the remnants of tiny marine crea...)Global Warming 55 Million Years Ago Too, Thanks to Fossil Fuels,Health

tained the remnants of tiny marine creatures called foraminifera. Their shells preserve a chemical record of how the balance of carbon in the ocean changed dramatically about 55 million years ago. At the same time, temperatures soared more than 10 degrees Fahrenheit, killing off more than half the different species of foraminifera.

The core also held evidence of an underwater landslide. Such a landslide would be expected if the methane, trapped as ice, had warmed dramatically, breaking apart into water and methane gas and bubbling ferociously out of the sea floor. The carbon in the methane would have altered the carbon balance in the seawater. And on reaching the atmosphere, the methane would have reacted with oxygen to form carbon dioxide, another greenhouse gas.

The Florida core is a sort of smoking gun from the seafloor, a spot where the carbon release actually happened, Miriam Katz of Rutgers University Ms. Katz said at the meeting.

She and Gerald Dickens, a paleoceanographer at James Cook University in Queensland, Australia had presented their findings on global warming at a conference in San Francisco in December 1999.
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