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Confluence of Biya and Katun Rivers Forming the Ob River, Russia

52.5N 85.2E

May 10th, 2010 Category: Mountains, Rivers

Russia - April 28th, 2010

Russia - April 28th, 2010

The Ob River crosses the upper half of this orthorectified image of western Siberia, Russia. It is the country’s fourth longest river and is famous for having the longest estuary in the world.

Here, the Ob can be observed at its origin: the confluence of the Biya and Katun Rivers, 16 miles (26 km) southwest of Biysk in Altai Krai (the city is visible upon opening the full image).

Both the Biya and the Katun have their origin in the Altai Mountains, visible here in the lower part of the image. The former issues from Lake Teletskoye; the latter, 80 miles (130 km) long, bursts out of a glacier on Mount Byelukha.

many square and rectangular fields can be seen near the river’s banks. Further south, the peaks of the Altai Mountains

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