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News Release 08-148
Yellowstone's Ancient Supervolcano: Only Lukewarm?
Molten plume of material beneath Yellowstone cooler than expected
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Yellowstone National Park and its famous geysers are the remnants of an ancient supervolcano.
Credit: U.S. Geological Survey
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The Yellowstone volcano's caldera, or sunken floor, covers an immense area.
Credit: U.S. Geological Survey
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