Diamond produced in oceanic crust by subsolidus decarbonation is refractory and immobile and can be stored at the base of the mantle over long timescales, potentially returning to the surface in OIB ...

According to the new research, these sunken supercontinents appear to be different from the surrounding remains of subducted crust ... plates and of a mantle plume rising from an LLSVP.

This phenomenon leads to the gradual disintegration of stable continental crust. Experts suggest that subduction—where a denser mantle layer is pushed beneath another—and mantle plumes ...

The processes led to the lithosphere, which consists of the Earth's crust and upper mantle, thinning and extending seaward.