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:

List

 * Bridge River Ocean, the ocean between the ancient Insular Islands (that is, Stikinia) and North America
 * Cache Creek Ocean, a Paleozoic ocean between the Wrangellia Superterrane and Yukon-Tanana Terrane
 * Iapetus Ocean, the Southern hemisphere ocean between Baltica and Avalonia
 * Kahiltna-Nutotzin Ocean, Mesozoic
 * Khanty Ocean, the Precambrian to Silurian ocean between Baltica and the Siberian continent
 * Medicine Hat Ocean, a small Proterozoic ocean basin
 * 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 (that is, Wrangellia) and North America
 * South Anuyi Ocean, Mesozoic ocean related to the formation of the Arctic Ocean
 * 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