Definition For Trench Ocean Floor

Trench definition is a long cut in the ground.

Definition for trench ocean floor.

Oceanic trenches typically extend 3 to 4 km 1 9 to 2 5 mi below the level of the surrounding oceanic floor. The deepest ocean depth to be sounded is in the challenger deep of the mariana trench. To place in a trench. A long steep sided valley on the ocean floor.

Bathymetry the shape of the ocean floor is largely a result of a process called plate tectonics the outer rocky layer of the earth includes about a dozen large sections called tectonic plates that are arranged like a spherical jig saw puzzle floating on top of the earth s hot flowing mantle. Trenched trench ing trench es v tr. These oceanographic features are the deepest parts of the ocean floor. Natural depression depression a sunken or depressed geological formation.

To dig or make a trench or trenches in land or an area for example. One used for military defense often with the excavated dirt thrown up in front. A deep furrow or ditch. Oceanic trenches are topographic depressions of the sea floor relatively narrow in width but very long.

Some of the most familiar ocean trenches are the result of this type of convergent plate boundary the peru chile trench off the west coast of south america is formed by the oceanic crust of the nazca plate subducting beneath the continental crust of the south american plate. The ryukyu trench stretching out from southern japan is formed as the oceanic crust of the philippine plate subducts. Oceanic trenches are a distinctive morphological feature of convergent plate boundaries along which lithospheric plates move towards each other at rates that vary from a few millimeters to over ten centimeters per year. Trench a long steep sided depression in the ocean floor.

Trench definition a long narrow excavation in the ground the earth from which is thrown up in front to serve as a shelter from enemy fire or attack. A deep furrow or ditch. Look it up now. Plate tectonics and the ocean floor.