Relier Pairs Oceanic reliefVersion en ligne What are these landforms? par Maru Cruz 1 Abyssal plain 2 Continental shelves 3 Ocean trenches 4 Continental slope 5 Ocean ridges Large expanse of land at the deepest part of the ocean Large underwater mountain ranges Deep depressions in the ocean floor Incline from the continental shelf down to the abyssal plain Plains underwater near coastlines