The irregular coastline of Kamchatka provokes large, circular eddies to spin off from the main southwestward-flowing Kamchatka current. Three such eddies are highlighted by surface ice floe patterns.
It is one of the great tectonic features of Africa—caused by fracturing of the Earth’s crust—and includes the classical geologic structures associated with a rift valley.
The Selenga River Delta, which stretches out into Russia’s Lake Baikal, is carved by an intricate network of channels and levees and surrounded by marshlands.