Submarine+Canyons

===Subamrine canyons are steep sided valleys on the sea floor of the continental slope. Submarine canyons are usually extensions of rivers or lakes. Canyons that are going through the continental slope have been found 2km below sea level. They are caused by volcanic activity and earthquake activity. Sometimes they can go on a become submarine channels. Submarine canyons are more common on steep slopes they are hard to find on normal slopes.The walls are very steep and are nearly vertical.===

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