(04-06-2021, 07:33 PM)RMH999 Wrote: Large blobs in the mantle may be parts of another planet
This was alluded to in the Youtube video Norgarth posted.
The Large Low-Shear Velocity Provinces (about 6% of the mantle) may be remnants of Theia, the believed proto-planet that impacted Earth and formed the Moon.
a video discussing the above concept (roughly 10.5 min)