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North America is dripping from below, geoscientists discover

  • Researchers discovered cratonic dripping, where the North American continent sheds rock into the mantle, beneath the Midwest in 2025.
  • An ancient oceanic crust slab, the Farallon plate, subducting under North America caused this cratonic thinning.
  • The Farallon slab redirects mantle flows, shearing the craton's underside, causing giant drips extending 400 miles deep.
  • Junlin Hua said, "A very broad range is experiencing some thinning," and Becker stated understanding this helps understand planetary evolution.
  • This cratonic thinning process occurs over millions of years and will not cause immediate surface changes, researchers assert.
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Phys.org broke the news in United Kingdom on Tuesday, April 1, 2025.
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