1.1.4. Deep Sea Plain

Deep sea plains are gently sloping areas of the ocean basins. These are the flattest and smoothest regions of the world. The depths vary between 3,000 and 6,000m. These plains are covered with fine-grained sediments like clay and silt.

Deep sea plains cover two-thirds of the ocean floor and are also known as abyssal plains. They also contain features like ridges, guyots and oceanic islands that sometimes rise above the sea level in the midst of oceans.