What are submarine canyons?

A submarine canyon is a steep-sided valley cut into the seabed of the continental slope, sometimes extending well onto the continental shelf, having nearly vertical walls, and occasionally having canyon wall heights of up to 5 km, from canyon floor to canyon rim, as with the Great Bahama Canyon.

Explanation:

A submarine canyon is a steep-sided valley cut into the seabed of the continental slope.

Explanation:

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