The world ocean is the water shell of the planet, occupying almost 75% of the Earth's area. It includes many seas and four oceans - the largest water bodies in the world.
Of course, the depth of the oceans varies depending on the geological structure of the bottom.
In order to determine the depth of the ocean,It is necessary to get acquainted with the structure of the seabed. Depending on the geological structure and position, there are four main types of relief of the ocean floor. The continental shelf is essentially a flat underwater part of the continent, its depth varies from 200 to 500 meters. The total world area of the shelves is about 32 million square kilometers. Behind the shelf there is a continental slope - the boundary between the shelf and the underwater edge of the continent, its depth is up to 3500 meters. The oceanic bed is the main part of the seabed, its depth is within 6000 meters. Tectonic faults in the ocean bed, creating "ravines" with a depth of more than 6 kilometers, are called deep-sea gutters.
The deepest point of the seabed is theMariana Trench located in the Pacific Ocean. Its depth is 11022 meters. At the same time, the average depth of the Pacific Ocean is about 4300 meters. In addition to the deepest depth, the Pacific Ocean is the largest of the four - its area is slightly less than the sum of the areas of all other oceans.
The second place in terms of maximum depth is occupied byAtlantic Ocean. The deep-water trench of Puerto Rico, going from the island of the same name to Central America, was studied in 1955, and measurements showed that the distance to the bottom in the deepest place is 8385 meters. The average depth of the Atlantic Ocean is 3600 meters.
In third place in record depth - SundaThe deep-water trough in the Indian Ocean. Stretching for 4000 kilometers along the bottom, opposite the island of Bali, it reaches a depth of 7,729 meters. As for the average depth of the Indian Ocean, it is 3900 meters.
Finally, the Arctic Ocean is the mostSmall both in area and in the number of seas belonging to it. Its maximum depth in the Greenland Sea is 5.5 kilometers, and the average is only 1200 meters. Such small figures are due to the fact that almost half of the area of its bottom belongs to the shelf, that is, it has a depth of up to 200 meters.