Tethys Ocean
During the Jurassic and Cretaceous periods, this part of Eurasia was covered by shallow seas that formed the northern margins of the Tethys Ocean. However, because Anatolia, the southern boundary of the Paleo-Tethys, is a part of the original Cimmerian continent, the last remnant of Paleo-Tethys Ocean might be oceanic crust under the Black Sea. The Tethys Ocean formed between Laurasia (Eurasia and North America) and Gondwana (Africa, India, Antarctica, Australia and South America) when the supercontinent Pangea broke up during the Triassic (200 million years ago).