A supercontinent last formed 300 million years ago, when all the land masses grouped together on the equator as Pangaea, centred about where West Africa is now. After looking at the geology of mountain ranges around the world, geologists had assumed that the next supercontinent would form either in the same place as Pangaea, closing the Atlantic Ocean like an accordion, or on the other side of the world, in the middle of the current Pacific Ocean.
But now researchers have analysed the magnetism of ancient rocks to work out their locations on the globe over time, and measured how the material under Earth's crust, the mantle, moves the continents that float on its surface. They found that instead of staying near the equator, the next supercontinent — dubbed Amasia — should form 90 degrees away from Pangaea, over the Arctic."
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