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A deep valley along the ocen floor beneath which oceanic crust slowly sinks toward mantle?
Wiki User
∙ 7y ago
This is known as a trench in a subduction zone.
Wiki User
∙ 12y ago
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Where oceanic crust sinks toward the mantle beneath continental crust a deep ocean?
A deep ocean subduction trench
What is the name of the process where ocean crust sinks back toward the mantle?
It is called subduction and only occurs in oceanic to oceanic or oceanic to continental plate collisions.
How is heat from the Earth's interior transferred to the crust?
Via currents of heated rock in the mantle which rise toward the surface. Very slowly.
What is the movement of Earth materials through the mantle and toward the crust due to heat transfer an example of?
It is an example of heat transfer by convection. Material heated by the outer core slowly moves toward the surface through the solid but plastically-mobile mantle.
Why does subduction occur at some tectonic plate boundaries?
Subduction occurs at convergent plate margins where plates are moving toward each other. Subduction occurs as old oceanic crust becomes thicker and more dense than the upper mantle directly below it. Because it is more dense, it is forced under younger, less dense oceanic crust, or under continental crust, which is always less dense. At these borders of collision, the older and more dense oceanic crust is drawn by gravity downward, into the mantle, where it is slowly melted. The two basic forces responsible are gravity and heat.
Where oceanic crust sinks toward the mantle beneath continental crust a deep ocean?
A deep ocean subduction trench
What is the name of the process where ocean crust sinks back toward the mantle?
It is called subduction and only occurs in oceanic to oceanic or oceanic to continental plate collisions.
SUbduction occurs where the oceanic crust bends down toward the mantle at a(an)?
deep ocean trench.
What forces drive the process in subduction zones dense pieces of oceanic crust are pulled downward toward the mantle?
gravity
What causes deep ocean trenches?
Subduction is a result of a collision between two tectonic plates, either oceanic to oceanic collision or oceanic to continental plate collision. The heavier, or more dense plate sinks under the more buoyant less dense plate, and is drawn down into the upper mantle.
What results from an oceanic plate to oceanic plate convergence?
The convergence creates a trench where the more dense of the two plates flows downward toward the mantle. Earthquakes may occur in the area of the plate boundary, as well as volcanism.
What force drives dense pieces of oceanic crust downward toward the mantle?
New crust is formed on the opposite end of the plate as it is pulled away from its neighbor
How is heat from the Earth's interior transferred to the crust?
Via currents of heated rock in the mantle which rise toward the surface. Very slowly.
What is the movement of Earth materials through the mantle and toward the crust due to heat transfer an example of?
It is an example of heat transfer by convection. Material heated by the outer core slowly moves toward the surface through the solid but plastically-mobile mantle.
What happens if an oceanic to oceanic happens?
When an oceanic to oceanic happens, two oceanic plates converge and one of the plates subducts into a trench. The subducted plate sinks down into the mantle and begins to melt. Molten rock from the plate rises toward the surface and forms a chain of volcanic islands, also called a volcanic island arc, behind the trench in the ocean.
Why does subduction occur at some tectonic plate boundaries?
Subduction occurs at convergent plate margins where plates are moving toward each other. Subduction occurs as old oceanic crust becomes thicker and more dense than the upper mantle directly below it. Because it is more dense, it is forced under younger, less dense oceanic crust, or under continental crust, which is always less dense. At these borders of collision, the older and more dense oceanic crust is drawn by gravity downward, into the mantle, where it is slowly melted. The two basic forces responsible are gravity and heat.
What means the ocean is pulled under the continent?
The ocean is never pulled under the continent. Oceanic crust--the rock and some sediments, however, slide under the edges of continental crust and are pushed downward toward the mantle in areas of oceanic to continental plate collisions.
