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