Lake basin

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Map of the lake basin

Basin or sea basin are sub tank of big, between the continents lying ocean basins. With an average sea ​​depth of 4000 meters, they are also called abyssal plains or deep-sea basins . Geologically, lake basins are characterized by the fact that they are underlaid by the oceanic crust .

Sea basins are bounded by submarine thresholds (sea ridges) or by continental shelves (or both). Small-scale depressions, the so-called sea ​​lows, can lie within a sea basin . An elongated deep-sea channel (deep-sea trench) can extend between the continental shelf and the sea basin . Sea lows and deep sea trenches are sometimes up to 4000 m deeper than the actual lake basin. But there are also areas within a sea basin that are less deep than the basins themselves. If they are small-scale, they are referred to as deep sea mountains (English: seamounts ), if they reach larger dimensions, they are called submarine plateaus .

Lake basins and deep sea basins worldwide

The sea basins and deep sea basins of the oceans and their tributaries include (sorted alphabetically):

Arctic Ocean

To the basin of the Arctic Ocean ( Arctic Ocean , Arctic Ocean , Arctic Ocean or Arctic ) include:

Atlantic Ocean

The sea basins of the Atlantic Ocean (Atlantic) include:

Indian Ocean

The sea basins of the Indian Ocean (Indic) include:

Pacific Ocean

Among the Seebnecken of the Pacific Ocean ( Pacific , Pacific Ocean or Big Ocean ) include:

Southern ocean

To the basin of the Southern Ocean ( Antarctic Ocean , Southern Arctic , Antarctic Ocean or Antarctica ), traditionally the Atlantic , Indian Ocean and Pacific attributed sea areas south of 60 ° south latitude, include this lake basin:

See also

References and comments

  1. Roi Granot: Palaeozoic oceanic crust preserved beneath the eastern Mediterranean. Nature Geoscience. 2016, doi: 10.1038 / ngeo2784 (advance online publication)
  2. Heather A. Stewart, Alan J. Jamieson: The five deeps: The location and depth of the deepest place in each of the world's oceans . In: Earth-Science Reviews 197, October 2019, 102896, doi: 10.1016 / j.earscirev.2019.102896 .
  3. a b The limits of merging the North and Central Pacific Basin are especially between Hawaii on the Hawaii-back and the Mexican Baja California not clearly fixed, especially as the two deep-sea large pool in this area of the Pacific Ocean seamlessly - without further swelling or back - interlock. However, the Central Pacific Basin to the west and a. clearly delimited from the North Pacific Basin by the massive Fanning Ridge with Fanning Island .