Hummock

Hummocks, and press ice, English Hummock be called in the pack ice, which are piled up by lateral pressure at the contact point between two or more sheets of ice surveys. You can be fresh or weathered already. The volume of ice is pressed down, engl. Called Bummock.

The hummocks are formed when ocean currents and winds exert pressure on the pack ice. The hills have an average aboveground height of one to two meters below sea level it up to 20 meters into the depths. The hummocks give the ice its characteristic appearance: large, flat ice, crossed by numerous long miniature mountains.

The hummocks are one of the reasons for the difficult locomotion in the Arctic and Antarctic and ask for icebreaker a significant obstacle