HomeAstronomy2 giant blobs in Earth's mantle may explain Africa's weird geology

2 giant blobs in Earth’s mantle may explain Africa’s weird geology

Deep within Earth’s mantle, there are two giant blobs. One sits under Africa, while the other is almost precisely opposite the first, under the Pacific Ocean. But these two blobs are not evenly matched. 

New research finds that the blob under Africa extends far closer to the surface — and is more unstable — than the blob under the Pacific. This difference could ultimately help to explain why the crust under Africa has been lifted upward and why the continent has seen so many large supervolcano eruptions over hundreds of millions of years. 

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