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