Earth’s Surface Water Dives Deep, Transforming Core’s Outer Layer

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ASU researchers contribute to discovery revealing more dynamic core-mantle interaction than previously known.

ASU researchers contribute to discovery revealing more dynamic core-mantle interaction than previously known.

A few decades ago, seismologists imaging the deep planet identified a thin layer, just over a few hundred kilometers thick. The origin of this layer, known as the E prime layer, has been a mystery — until now.

An international team of researchers, including Arizona State University scientists Dan Shim, Taehyun Kim and Joseph O’Rourke of the School of Earth and Space Exploration, has revealed that water from the Earth's surface can penetrate deep into the planet, altering the composition of the outermost region of the metallic liquid core and creating a distinct, thin layer.

Their research was recently published in Nature Geoscience.

Read more at Arizona State University