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11/09/2007

U. scientists say Yellowstone caldera may be filling with magma

Utah, USA
Image:
Castle Geyser at Yellowstone National Park.
The floor of the Yellowstone caldera has risen at a rate faster than has ever been observed before, according to a new study that gives further proof that "ground deformation" at the park resembles the gently heaving chest of a slumbering giant.
The likely cause of the uplift is a volcanic intrusion of molten rock that has moved upward 50 to 60 miles and flattened into a pancake the size of Los Angeles a few miles below the surface, according to a study to be published Friday by University of Utah scientists.
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