Methane feeds subsea ice mounds off Siberia

Pingos are spectacular landforms associated with permafrost in the Arctic. They are circular or elliptical formations protruding from the level ground of the tundra, and can be up to 60 meters high. In essence, they are huge lumps of ice covered with soil. Similar structures are now found strewn on the ocean floor in the Arctic shallow seas.

from Oceanography News -- ScienceDaily http://ift.tt/1Yfjyxs
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