The
Uralian orogenic belt is usually thought of as the boundary between
Europe and
Asia. It extends from the
Aral Sea to
Novaya Zemlya, and it includes the
Ural Mountains, the
Pay-Khoy Ridge, and the
Mughalzhar Hills of northwest
Kazakhstan. Its total length is about 3,500
kilometres (2,175
miles), of which the Ural Mountains are about 2,500 kilometres (1,550 miles).