The Turgai Sea, also known as the Turgay Sea, Turgai Strait, Obik Sea or West Siberian Sea, was a large shallow body of salt water (an epicontinental or epeiric sea) during the Mesozoic through Cenozoic Eras. It extended north of the present-day Caspian Sea to the "paleo-Arctic" region, and was in existence from the Middle Jurassic to Oligocene, approximately 160 to 29 million years ago. The Turgai Sea was not absolutely continuous throughout this entire era, though it was a persistent and predominating feature in its region; it "fragmented southern Europe and southwestern Asia into many large islands, and separated Europe from Asia." The division of the Eurasian landmass by the Turgai Sea had the effect of isolating animal populations. One of the better known groups are the ceratopsian dinosaurs during the Cretaceous Period, which were restricted to Asia and western North America that were connected for much of the era.Culver, Stephen J., and Peter Franklin Rawson. ''Biotic Response to Global Change: The Last 145 Million Years.'' Cambridge, Cambridge University Press, 2000; p. 319. The existence of the Turgai Sea also restricted various freshwater fish and amphibians. The Turgai Sea derives its name from a region of modern-day Kazakhstan, with its Turgai River and Turgai Valley.

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Category:Historical oceans Category:Jurassic paleogeography Category:Cretaceous paleogeography Category:Paleogene paleogeography {{palaeo-geo-stub