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:

hope this helped :)

a characteristic is a deep cut in the earth or left over rock aka till.  

answer conditional instability;