A large underwater mountain range. Oceanic Ridge.
A large piece of land surrounded by water on three sides. Peninsula.
A piece of land completely surrounded by water. Island.
The undersea extension of a continent that descends gradually to depths of around 400 metres. Continental Shelf.
A group of mountains. Mountain Range
Head of land projecting into a body of water. Cape.
A natural elevation of the earth's surface rising more or less abruptly to a summit. Mountain.
A flat area at high altitude. Plateau.
Area of land between two mountains. Valley.
A large bay. It forms the shape of an arc. Gulf.
A large open area of flat land at low altitude. Plain.
A steep underwater area that links the continental shelf with the ocean floor. Continental slope.
An area of land lower than the surrounding area. Sometimes, a basin is formed from the erosive action of a river. Basin.
A flat area of ocean floor, found at depths of between 3000 and 7000 metres. Abyssal plain.
Depressions of the ocean floor that often reaches depths of 6000 metres and sometimes 11000 metres. Oceanic Trench.
A group of islands. Archipelago.
