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1. Continental Platform

   • It's the underwater extension of continents that streches from the coast up to its endpoint, which can range from 1 to 500km in width. It has a gradual slope and it is up to 200m in depth. It is also known as the continental shelf.

2. Continental Drop

   • It is a steep, sharp slope. It starts where the continental platform ends, it is approximately 200m deep and ends in the abyssal plain, about 4,000m in depth.

3. Abyssal Plain

   • It's an immense plain, though not completely flat, located at an average depth of 3,800m. It is where ocean ridges, countless underwater volcanoes and oceanic ditches and trenches are found.

4. Ocean Ridges

   • They are underwater mountain ranges that originate from the accumulation of magmatic material that comes from the Earth's mantle. When they reach the surface they give rise to volcanoes.

5. Oceanic Ditches

   • They are narrow and extended ditches of grat depth. Some exceed 10,000 meters, like the Mariana Islands in the Pacific.

6. Costal Topography

   • It's the topography of coasts. Depending on their Altitude, they can be either low and high, or cliff-like. Depending on their shape, they can be straight or have ins and outs.