Nonetheless it brings up a chicken-and-egg question. In the event that dish tectonics is mainly motivated of the pushes made by downgoing slabs, how would tectonics keeps obtained been ahead of there have been subducting pieces?

As continental crust isn’t thicker enough to become drawn with the the mantle because of the subduction, it is gone up to to the World’s epidermis as a result of a cycle out-of supercontinent development and you may break up. Credit: K. Cantner, AGI. 자세히 보기