Caspian Sea the east often changed course to empty into the Caspian through a now-desiccated riverbed called the Uzboy River, as did the Syr Darya farther north. The Caspian also has several small islands; they are primarily located in the north and have a collective land area of roughly . Adjacent to the North Caspian is the Caspian Depression, a low-lying region below sea level. The Central Asian steppes stretch across the northeast coast, while the Caucasus mountains hug the western shore. The biomes to both the north and east are characterized by cold, continental deserts. Conversely, the climate to the southwest
Black Sea 1570 map of Asia titled from Abraham Ortelius's labels the sea ("Great Sea", compare Latin ). English-language writers of the 18th century often used the name "Euxine Sea" ( or ) to refer to the Black Sea. Edward Gibbon, for instance, calls the sea by this name throughout "The History of the Decline and Fall of the Roman Empire". During the Ottoman Empire period, the Black Sea was called either or , both meaning "the Black Sea" in the Ottoman Turkish. In the tenth-century geography book , which was written in Persian by an unknown author, the Black Sea is