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High-pressure water triggers tremors.(earthquake research)(Brief Article)
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Science News
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November 21, 1998
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Copyright informationCOPYRIGHT 1998 Science Service, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Tiny droplets of water may seem too inconsequential to break rock, but three Yale University geologists now say that water trapped far below Earth's surface can set off earthquakes.
Deep underground, heat and pressure expel water from the crystals of certain minerals, transforming one structure into another. "The classical view of metamorphism is that fluid is released very slowly and continuously in teeny, tiny amounts over millions of years," says Jay J. Ague, a coauthor of the report appearing in the Nov. 15 Geophysical Research Letters. "What we show is that once one of these [transformations] gets going, a lot of water can be released over decades or hundred-year ...
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