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It is called subduction.

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Q: What is the process of the ocean floor sinking beneath a deep ocean trench and back into the mantle known as?
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What is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary called?

This process is called subduction.


What is subuction?

subduction is the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.


What are happening to the earths plates in Japan Trench?

The pacific oceanic plate is sinking beneath conential plate


Describe the process of subduction at a deep ocean trench?

Where one plate is pushed downward beneath another plate into the underlying mantle when plates move towards each other..=)


Where oceanic crust sinks toward the mantle beneath continental crust a deep ocean?

A deep ocean subduction trench


What made the mariana trench features present?

When a piece of the ocean floor cracks, one side of the crack will sink beneath the other side. As it sinks, it pulls the rest of its plate with it. The sinking sea floor grinds against the other side of the crack and tears parts off. The result is a long, deep trench. This process is how the Mariana Trench formed.


What would happen to the process of the sea floor spreading if the heat from the core no longer existed?

A deep trench to the mantle


Which direction does the Benioff Zone descend from the trench into the mantle?

The Benioff Zone is formed when a piece of oceanic crust is being subducted into the mantle. This line of earthquakes follow the angle of the subducting plate as it slides beneath the continental crust.


A deep valley along the ocen floor beneath which oceanic crust slowly sinks toward mantle?

This is known as a trench in a subduction zone.


Why do Earth scientists think that rigid slabs of the lithosphere are descending into the mantle near the Tonga Island?

Close by the Tonga Island on the ocean floor lies the Tonga trench, which is a convergent boundary. At the Tonga trench the Pacific plate is subducting beneath the Australian-Indian plate, sending slabs of the Pacific plate into the mantle.


What is happening to the earth's plates at the japan trench?

The pacific oceanic plate is sinking beneath the continental plate to which Japan is attached in what is called a subduction zone. The oceanic plate is being destroyed.


Plate with oceanic crust sinking under another plate with oceanic crust?

When two oceanic plates or two plates both containing oceanic crust collide or converge, the convergent boundary will form a trench. The plate which has the higher density will plunge beneath the other plate forming a trench.