Caption:
Landforms on the ocean floor are as diverse as continental landforms. Under the surface. of the ocean, mountains, plains, plateaus, volcanoes, trenches, and canyons form stunning landscapes and many of these formations are much larger than are those on land. For instance, vast abyssal plains are crossed by immense mountain ranges, called oceanic ridges, that stretch almost 70,000 kilometers in length. These underwater mountain ranges are between 1,000 and 3,000 meters high, and running their entire length is a rift, a central subsidence plain that forms as the oceanic plates separate.