The Ural (, ), known before 1775 as Yaik (, , ; , ), is a river flowing through Russia and Kazakhstan in the continental border between Europe and Asia. It originates in the southern Ural Mountains and discharges into the Caspian Sea. At , it is the third-longest river in Europe after the Volga and the Danube, and the 18th-longest river in Asia. The Ural is conventionally considered part of the boundary between the continents of Europe and Asia. The Ural rises near Mount Kruglaya in the Ural Mountains, flows south parallel and west of the north-flowing Tobol, through Magnitogorsk, and around the southern end of the Urals, through Orsk where it turns west for about , to Orenburg, where the river Sakmara joins. From Orenburg it continues west, passing into Kazakhstan, then turning south again at Oral, and meandering through a broad flat plain until it reaches the Caspian a few miles below Atyrau, where it forms a fine 'digitate' (tree-like) delta. Geography The river begins on the slopes of the Kruglaya Mountain of the Uraltau mountain ridge in South Ural, on the territory of the Uchalinsky District of Bashkortostan. There it has an average width of and flows as a typical mountain river. It then falls into the Yaik Swamp and after exiting it widens up to . Below Verkhneuralsk, its flow is characteristic of a flatland river; there it enters Chelyabinsk and Orenburg Oblasts. From Magnitogorsk to Orsk its banks are steep and rocky and the bottom has many rifts. After Orsk, the river abruptly turns west and flows through a long canyon in the Guberlinsk Mountains. After Uralsk, it flows from north to south, through the territory of West Kazakhstan Region and Atyrau Region of Kazakhstan. There, the river widens and has many lakes and ducts. Near the mouth, it splits into the Yaik and Zolotoy distributaries and forms vast wetlands. The Yaik distributary is shallow, with almost no trees on the shores, and is rich in fish; whereas Zolotoy is deeper and is navigable. Ural River has a spectacular tree-like (or "digitate") shape of the delta (see image). This type of delta forms naturally in the slow rivers which deliver a great deal of sediments and flow into a quiet sea. In the delta, from the mouth of the Zolotoy distributary lies Shalyga Island, which is long, with heights of and maximum widths of