Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

composed of former oceanic crust. "It is … fascinating to see the links between the movements of plates on the Earth's ...

Deep within Earth’s mantle lie two enormous, continent-sized structures known as LLVPs. Scientists once believed these ...

And the crust is this layer of solid rock that we live on ... These plates can be oceanic, meaning they're found mainly under the ocean, or continental, and mainly found under land.