Asked by: Yakout Barahona
asked in category: General Last Updated: 24th February, 2020

Why do oceanic plates Subduct under continental plates?

When oceanic crust converges with continental crust , the denser oceanic plate plunges beneath the continental plate . This process, called subduction , occurs at the oceanic trenches. The subducting plate causes melting in the mantle above the plate . The magma rises and erupts, creating volcanoes.

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Herein, why do oceanic plates go under continental plates?

When an oceanic plate collides with a continental plate the crust forming the oceanic plate gets bent and pulled under the continental crust . This is because the rocks that form the oceanic crust are denser and thinner than the rocks that form the continental crust .

Subsequently, question is, why would an oceanic plate divide or Subduct beneath a continental plate? Sometimes a plate carrying oceanic crust collides with a plate carrying continental crust. Oceanic crust is more dense than continental crust. The less dense continental crust can 't sink under the more dense oceanic crust. When two plates carrying continental crust collide, subduction does not take place.

Hereof, what happens when a continental plate collides with an oceanic plate?

When continental and oceanic plates collide , the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate . The oceanic plate is forced down into the mantle in a process known as "subduction." As the oceanic plate descends, it is forced into higher temperature environments.

How thick are continental plates?

Continental tectonic plates range in thickness from 30 - 50 km while oceanic plates are thinner, they range from 5 -10 km thickness .

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