Matching Pairs Ocean Floor FeaturesOnline version oceanic landforms by Taylor Tant 1 Continental Shelf 2 Rift/ Rift Zone 3 Trench 4 Mid Ocean Ridge 5 Continental Slope 6 Abyssal Plain the center of the highest part of the mid-ocean ridge; it is a narrow trench The steep slope where the continental shelf drops to the bottom of the ocean floor underwater volcanic mountains that divide the ocean floor into 2 parts The edge of the continent that is under water; shallow part of the ocean large area of flat land on the ocean floor a steep-sided canyon with deep, narrow valleys in the bottom of the ocean.