![]() Iceberg plowing affects the seascape of both the Antarctic and northern hemisphere high latitudes at a range of water depths dependent upon the iceberg source. It may then remain anchored to the seafloor, rocking and twisting, and may produce a pit deeper than the maximum scour depth. An iceberg may also produce pitting when its draft is suddenly increased through splitting or rolling. Seabed scouring has also been documented in Antarctica, but to date has generated little interest because of the absence of seabed structures.Ī single scour may be as wide as 30 m, as deep as 10 m, and longer than 100 km. They are present at water depths up to about 200 m. ![]() Modern iceberg scours appear in the form of linear to curvilinear scour marks and as pits, and occur from the Baffin Bay/Davis Strait region to the Grand Banks of Newfoundland. Marine navigators have long known that the keels of icebergs drifting south over the relatively shallow banks of Canada's eastern continental shelf may touch the seabed and become grounded. While small icebergs pose a serious threat to structures at the sea surface, sea bed structures such as well-heads, pipelines, cables, and mooring systems are endangered by large icebergs, which may possess a deep enough draft to collide with the seafloor. Diemand, in Encyclopedia of Ocean Sciences, 2001 Seabed Damage
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