Marianas Trench Sea Floor Spreading

The mariana trench the mariana arc this 3 d sketch shows a cross section of the mariana arc with some of its main structures and features.

Marianas trench sea floor spreading.

Oceanic trenches are topographic depressions of the sea floor relatively narrow in width but very long. It is crescent shaped and measures about 2 550 km 1 580 mi in length and 69 km 43 mi in width. Seven miles is a long way down. The mariana trench is the home for the challenger deep which.

Victor vescovo spent four. Mariana trench also called marianas trench deep sea trench in the floor of the western north pacific ocean the deepest such trench known on earth located mostly east as well as south of the mariana islands it is part of the western pacific system of oceanic trenches coinciding with subduction zones points where two adjacent tectonic plates collide one being forced below the other. Where large old seamounts are present on the pacific plate at the subduction zone the trench is shallower. It is the deepest oceanic trench on earth.

In a subduction zone some of the molten material the former seafloor can rise through volcanoes located near the trench. Deep sea trenches real life example the deepest trench in the world is the mariana trench located near the mariana islands. These oceanographic features are the deepest parts of the ocean floor. The mariana trench in the south pacific ocean is formed as the mighty pacific plate subducts beneath the smaller less dense philippine plate.

The challenger deep at the southern end of the marianas trench plunges deeper into the earth s interior nearly 11 000 m than mount everest the world s tallest mountain rises above sea level about 8 854 m. At the mariana trench the downgoing plate is called the pacific plate and the overriding plate is the philippine sea plate. The numbers represent the speed of sound in the various layers beneath the arc measured by the precise timing arrivals from earthquakes and man made sources. The maximum known depth is 10 984 metres 36 037 ft 25 metres 82 ft 6 825 miles at the.

To reach the deepest part of the mariana trench james cameron will descend. An american explorer has descended nearly 11km seven miles to the deepest place in the ocean the mariana trench in the pacific. Subduction processes in oceanic oceanic plate convergence also result in the formation of volcanoes. The depth of the mariana trench varies along its length.

More than a mile deeper than mt.