“Vast Fragments of an Alien World Could Be Buried Deep Within Earth Itself”
Vast Fragments of an Alien World Could Be Buried Deep Within Earth Itself
PETER DOCKRILL24 MARCH 2021
They are among the largest and strangest of all structures on Earth: huge, mysterious blobs of dense rock lurking deep within the lowermost parts of our planet’s mantle.
There are two of these gigantic masses – called the large low-shear-velocity provinces (LLSVPs) – with one buried under Africa, the other below the Pacific Ocean.
These anomalies are so massive, they in turn breed their own disturbances, such as the large phenomenon currently evolving within and weakening Earth’s magnetic field, known as the South Atlantic Anomaly.
As for how and why the LLSVPs came to exist like this within the mantle, scientists have lots of ideas, but little in the way of hard proof.
What is known, however, is that these giant blobs have been around for a very long time, with many thinking they could have been a part of Earth since before the giant impact that birthed the Moon – ancient traces of the collision between Earth and the hypothetical planet Theia.”