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Thursday, March 17, 2005

Old Supervolcanoes Give Yellowstone Clues

The Discovery Channel explores the geo-history of supervolcanoes:


Clues to past and future mega-eruptions of North America's biggest volcanoes are being unearthed just miles from Yellowstone National Park.

An hour's drive southwest of Yellowstone is a place geologists call the Heise Volcanic Field. Heise is the most recently deceased ancestor in a 400-mile-long line of seven supervolcanoes, stretching from Yellowstone southwest to the Nevada-Idaho state line, near McDermitt, Nevada.

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