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