Geography
Answer
There are occasional depressions in the Ob-Yenisei lowland. When the northern part of the rivers freeze during winter, the outlet of water to the Arctic Sea is sealed. The water overflows and the middle parts have floods. The flood water flows to the depressions and fills them up. This way, vast swamps and marshy areas are created in the northern lowlands of Asia. Hence, the Northernmost part of Asia is marshy.
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