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