In historical geology, Panthalassa, also known as the Panthalassic Ocean or Panthalassan Ocean, was the vast superocean that encompassed planet Earth and surrounded the supercontinent Pangaea, the lat
The Panthalassa superocean 250 million years ago
The supercontinent Pangaea in the early Mesozoic (at 200 Ma) surrounded by Panthalassa.
The Pacific Plate began forming when the triple junction at the center of Panthalassa destabilized about 190 million years ago.