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Rainwater discovered at new depths, with high pressure and temperatures over 300 degrees Celsius

from University of Southampton via ScienceDaily

Researchers have found that rainwater can penetrate below the Earth's fractured upper crust, which could have major implications for our understanding of earthquakes and the generation of valuable mineral deposits. It had been thought that surface water could not penetrate the ductile crust — where temperatures of more than 300 degrees Celsius and high pressures cause rocks to flex and flow rather than fracture — but researchers have now found fluids derived from rainwater at these levels. Fluids in the Earth's crust can weaken rocks and may help to initiate earthquakes along locked fault lines. more

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