Word: geochron
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Dates: during 1995-1995
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...caused such indiscriminate carnage? Marauding comets, exploding stars, greenhouse warming, ice-age cooling, sea-level drops, sea-level rises, ocean stagnation, oxygen depletion--every calamity imaginable has been invoked to explain the Permian extinction. But none of these agents of doom, argues geologist Paul Renne, director of the Berkeley Geochron ol ogy Center in California (and lead author of the Science article), comes as close to explaining what happened at the end of the Permian as the rampant, prolonged volcanism that created the terrace-like formations known as the Siberian Traps...
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