Historical oceans

prehistoric ocean

thumb|upright=1.3|The Panthalassa superocean 250 million years ago thumb|upright=1.3|The supercontinent Pangaea in the early Mesozoic (at 200 Ma) surrounded by Panthalassa. thumb|upright=1.3|The Pacific Plate began forming when the [[triple junction at the center of Panthalassa destabilized about 190 million years ago.]] Panthalassa, also known as the Panthalassic Ocean or Panthalassan Ocean (from Greek "all" and "sea"), was the vast superocean that encompassed planet Earth and surrounded the supercontinent Pangaea, the latest in a series of supercontinents in the history of Earth. During the

thumb|right|alt=Palaeogeographical reorganization of the Tethys–Paratethys region during the Paleogene, from a connected Tethys configuration during the early Eocene (above) to a fragmented and restricted Paratethys region configuration during the Oligocene (below).|Palaeogeographical reorganization of the Tethys–Paratethys region during the Paleogene, from a connected Tethys configuration during the early [[Eocene (above) to a fragmented and restricted Paratethys region configuration during the Oligocene (below). Note the loss of deep-water connections between the Indian Ocean region and the

historic ocean

large inland sea during the mid- to late Cretaceous and the very early Paleogene; split North America into Laramidia and Appalachia; stretched from the Gulf of Mexico to the Arctic Ocean; at its largest, it was 760 m deep, 970 km wide, 3200 km long

shallow ancient sea located where the Pannonian Basin in Central Europe is today

ocean on the margin of Gondwana between the Middle Cambrian and Late Triassic

ancient ocean which separated two major palaeocontinents, Gondwana and Laurussia

right|200px|thumb|The supercontinent Pangaea surrounded by the superocean Panthalassa.

Mirovia or Mirovoi (from Russian мировой, mirovoy, meaning "global") was a hypothesized superocean which may have been a global ocean surrounding the supercontinent Rodinia in the Neoproterozoic Era, about 1 billion to 750 million years ago. Mirovia may be essentially identical to, or the precursor of, the hypothesized Pan-African Ocean, which followed the rifting of Rodinia. The Panthalassa (proto-Pacific) Ocean developed in the Neoproterozoic Era by subduction at the expense of the global Mirovia ocean.

large shallow body of salt water of the Mesozoic and Cenozoic Eras

ancient ocean that existed from the latest Ediacaran to the Carboniferous

theory that nearly a third of the surface of Mars was covered by an ocean of liquid water early in the planet’s geologic history

small Precambrian ocean between Baltica and the Siberian continent

historic ocean

small, ancient ocean between Siberia and Baltica; formed in the Late Ordovician epoch; began to shrink in the Devonian Period and became a seaway

inland sea that existed in North America during the mid-to-late Jurassic Period of the Mesozoic Era

sea between the palaeocontinents Avalonia and Baltica about 600 to 450 million years ago

historic ocean

Planet earth former oceans

Subducted ocean. Remnants found in the Alps in the North Penninic nappes.

Mesozoic-era seaway that lay along the northern border of Laurasia