It is an underwater plain that is formed by the deepest floor of the oea and is about 3000 meters in depth and this plain area is thus one of the most levelled land surface as its located naet to the mod oceanic ridges it forms the area where the area is spreaded and smoothened out of the geologic processes of the earth and thus is more flat and less rugged.
The abyssal plain covers more than 50% of the earth oceanic surface area.