What specific geological features deep beneath the mantle are speculated to be chemically distinct, surviving remnants of Theia?

Answer

Large Low-Shear-Velocity Provinces (LLSVPs)

Scientists speculate that the LLSVPs, massive blobs chemically and thermally distinct from surrounding mantle rock beneath Africa and the Pacific, might be the incorporated, undigested remnants of Theia’s core/mantle material.

What specific geological features deep beneath the mantle are speculated to be chemically distinct, surviving remnants of Theia?

#Videos

What was Theia like? - YouTube

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