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Panthalassa, also known as the Panthalassic or Panthalassan Ocean, (from Greek Ïá¾¶Î½ all and Î¸Î¬Î»Î±ÏÏÎ± sea), was the superocean that surrounded the supercontinent Pangaea. During the PaleozoicâMesozoic transition c. 250 Ma it occupied almost 70% of Earth's surface.
Pangea is the name given by Alfred Wegener to a supercontinent which existed several hundred million years ago. According the the theory of continental drift, this single global continent split up and, through the process of plate tectonics, has resulted in the current locations of the major continental landmasses.