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