Subduction Change The Ocean Floor

The density of ocean water is 1 025x10 3 kg m 3.

Subduction change the ocean floor.

The magnetism of mid ocean ridges helped scientists first identify the process of seafloor spreading in the early 20th century. Therefore seafloor dating isn t that useful for studying plate motions beyond the cretaceous. Asked by anon on february 25 2020. Subduction is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle.

A calculate the guage pressure on the diver on the ocean floor. These age data also allow the rate of seafloor spreading to be. Basalt the once molten rock that makes up most new oceanic crust is a fairly magnetic substance and scientists began using magnetometers to measure the magnetism of the ocean floor in the 1950s what they discovered was that the magnetism of the ocean floor around. A subduction cause magma to accumulate on the ocean floor b subduction causes oceanic crust to break into pieces c subduction causes the ocean floor to sink into deep ocean trenches.

3 get other questions on the subject. A diver descends from a salvage ship to the ocean floor at a depth of 35 m below the surface. The deepest parts of the ocean floor are caused by plate tectonic subduction and occur where the sea floor sinks back into the mantle in a subduction zone. That is the time it takes for new rock to form at the mid ocean ridge move across the ocean and sink into a trench.

Regions where this process occurs are known as subduction zones rates of subduction are typically measured in centimeters per year with the average rate of convergence being. The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid ocean ridge is the spreading half rate and is equal to half of the spreading rate. Subduction of the ocean floor occurs in. Spreading rates determine if the ridge is fast intermediate or slow.

Spreading rate is the rate at which an ocean basin widens due to seafloor spreading. Melting glaciers and ice caps b. The processes of subduction and sea floor spreading can change the size and shape of the oceans. As upwelling of magma continues the plates continue to diverge a process known as seafloor spreading.

As plants meet their needs for making food from air soil water and the sun s energy in a process called there are plants called grow high in trees without here are words to put in the blanks. Because of this correlation between age and subduction potential very little ocean floor is older than 125 million years and almost none of it is older than 200 million years. How does subduction change the ocean floor. For that geologists date and study continental crust.

Samples collected from the ocean floor show that the age of oceanic crust increases with distance from the spreading centre important evidence in favour of this process. Biology 21 06 2019 16 30 thebrain1345. Because of these processes the ocean floor is renewed about every 200 million years.