The Probert Encyclopaedia of Places of the World

IAPETUS OCEAN

The Iapetus Ocean or Pro-Atlantic Sea was an ocean that existed in early Paleozoic times between the continent that was to become Europe and the continent which was to become North America. The continents moved together in the late Paleozoic, obliterating the ocean. When they moved apart once more, they formed the present day Atlantic Ocean.
Research Iapetus Ocean