List of ancient oceans

This is a list of former oceans that disappeared due to tectonic movements and other geographical and climatic changes. In alphabetic order:

• Bridge River Ocean, the ocean between the ancient Insular Islands (i.e. Stikinia) and North America
• Iapetus Ocean, the southern hemisphere ocean between Baltica and Avalonia
• Khanty Ocean, the Precambrian to Silurian ocean between Baltica and the Siberian continent
• Mezcalera Ocean, the ocean between the Guerrero terrane and Laurentia
• Mirovia, the ocean that surrounded the Rodinia supercontinent
• Mongol-Okhotsk Ocean, the early Mesozoic ocean between the North China and Siberia cratons
• Oimyakon Ocean, the northernmost part of the Mesozoic Panthalassa Ocean
• Paleo-Tethys Ocean, the ocean between Gondwana and the Hunic terranes
• Pan-African Ocean, the ocean that surrounded the Pannotia supercontinent
• Panthalassa, the vast world ocean that surrounded the Pangaea supercontinent, also referred to as the Paleo-Pacific Ocean
• Pharusian Ocean, Neoproterozoic
• Poseidon Ocean, Mesoproterozoic
• Pontus Ocean, the western part of the early Mesozoic Panthalassa Ocean
• Proto-Tethys Ocean, Neoproterozoic
• Rheic Ocean, the Paleozoic ocean between Gondwana and Laurussia
• Slide Mountain Ocean, the Mesozoic ocean between the ancient Intermontane Islands (i.e. Wrangellia) and North America
• Tethys Ocean, the ocean between the ancient continents of Gondwana and Laurasia
• Thalassa Ocean, the eastern part of the early Mesozoic Panthalassa Ocean
• Ural Ocean, the Paleozoic ocean between Siberia and Baltica

See also

• Paratethys
• Piemont-Liguria Ocean
• Superocean, an ocean that surrounds a global supercontinent
• Valais Ocean