Ob River Crossing West Siberian Plain, Russia53.3N 82.9E
The West Siberian Plain is a large plain that occupies the western portion of Siberia and Russia. Much of the plain is poorly drained and consists of some of the world’s largest swamps and floodplains. In fact, it is one of the world’s largest areas of peatlands, which are characterized by raised bogs. Here some of those marshy areas appear as greyish streaks across the white, snow-covered landscape.
The plain covers an area of more than 975,000 sq.mi. It has been described as the world’s largest unbroken lowland—more than 50 percent is less than 330 feet (100 m) above sea level— and covers an area of about 2.6–2.7 million km² which is about one third of Siberia. It extends from north to south for 2,400 km, from the Arctic Ocean to the foothills of the Altay Mountains, and from west to east for 1,900 km from the Yenisei River to the Ural Mountains.
The principal rivers in the West Siberian Plain are the Ob, Irtysh, and Yenisei. Here, the Ob River is visible in the upper right quadrant. Glacial deposits on the plain extend as far south as the Ob-Irtysh confluence, forming occasional low hills and ridges, but otherwise the plain is exceedingly flat and featureless.