Continental roots might not be as deep as suspected

Sea Technology | May 1, 2003| | Copyright

The roots of the continents go down between 200 and 250 kilometers, forming a distinct boundary with the underlying mantle like that seen under the oceans, according to a team of seismologists at the University of California, Berkeley.

Their interpretation of seismic data impacts a debate within the geophysical community about the depth of the boundary between the rigid lithosphere that floats on the Earth's surface and the hot convecting mantle that underlies it.

"It was very clear that you had a lithosphere about 80 kilometers thick, on average, in the ocean basins, and under that is the ...

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