Formation Of New Ocean Floor Deep Ocean Trenches

Some famous trenches challenger deep is the deepest portion present in the crescent shaped mariana trench found in the pacific ocean. Where plates diverge from each other molten magma flows upward between the plates forming mid ocean ridges underwater volcanoes hydrothermal vents and new ocean floor crust. Deep sea trench any long narrow steep sided depression in the ocean bottom in which occur the maximum oceanic depths approximately 7 300 to more than 11 000 metres 24 000 to 36 000 feet.

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They are also the deepest part of the seafloor.

Formation of new ocean floor deep ocean trenches.

The types of rocks found in these ocean trenches are also asymmetrical. It is estimated to be 36 037 feet 10 984 m below. This makes the tonga trench an important site for further scientific research into the formation of the ocean floor and oceanic trenches. Trenches form natural boundaries between two tectonic plates.

Thus for each segment of new ocean floor created at the ridges an equal amount of old oceanic crust is destroyed at the trenches or so called subduction zones. Cools contracts becomes more dense as new seafloor is carried away from an ocean ridge it than the material beneath it. As new seafloor is carried away from an ocean ridge it heats up expands and becomes less dense than the material beneath it. Trenches are depression in the ocean floor.

The theory of states that new ocean crust is formed at ocean ridges and destroyed at deep sea trenches. Seafloor spreading true or false. As plates converge one plate may move under the other causing earthquakes forming volcanoes or creating deep ocean trenches. On the inner slope continental side the trench walls are much more steep.

On a trench s outer slope the oceanic side the slope is gentle as the plate gradually bends into the trench. The theory of continental drift states that new ocean crust is formed at ocean ridges and destroyed at deep sea trenches. They typically form in locations where one tectonic plate subducts under another. A trench forms between the two plates in a subduction zone.

There are 20 major trenches on earth and 17 of these trenches can be found around the pacific ocean basin. Ocean trenches formed by this continental oceanic boundary are asymmetrical. The rate at which these plates are converging is the fastest recorded in the world reaching between 6 and 9 inches per year. It is for this reason that the oldest segment of ocean floor found in the far western pacific is apparently only about 200 million years old even though the age of earth is.

Mariana trench is famed as the deepest trench in the entire stretch of oceanic crust on the earth and is located in the east of mariana islands near guam.

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