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The crust under the ocean is typically about 3 to 5 miles (5 to 8 kilometers) deep.

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4mo ago

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What is the process where oceanic crust is sinking under continents at deep ocean trenches?

Sinkation


What happens when heavier oceanic crust converges with lighter crust at a deep ocean trench?

When heavier oceanic crust converges with lighter crust at a deep ocean trench, the heavier oceanic crust is usually forced under the lighter crust in a process known as subduction. This can create deep ocean trenches and volcanic arcs on the overriding plate. The subducting plate can also melt and cause volcanic activity.


Why is the ocean so deep?

The ocean is deep because of the Earth's crust, which is thinner under the ocean than on land. This allows more space for water to fill, creating the deep ocean basins. Additionally, the movement of tectonic plates can also create deep trenches in the ocean floor.


How does a deep-ocean trench form?

They form when the oceanic crust goes under the Continental crust. The oceanic crust then forms the trenches through a process called subduction.


Crust under the ocean is called?

Crust under the oceans is called oceanic crust.


What is deep-trenches?

a deep-ocean trench is a portion of the earth crust


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 is deep oceans trenches?

a deep-ocean trench is a portion of the earth crust


What kind of crust is found under the ocean?

oceanic crust


How deep is the earth's crust in feet?

The oceanic crust, or the crust of the earth that is under water, is between 15,840 feet and 31,680 feet thick. The continental crust, or the crust not covered in ocean water, is between 105,600 feet and 158,400 feet thick.


How deep is the the Earth's crust in feet?

The oceanic crust, or the crust of the earth that is under water, is between 15,840 feet and 31,680 feet thick. The continental crust, or the crust not covered in ocean water, is between 105,600 feet and 158,400 feet thick.


Why do deep-ocean trenches form at both types of subduction?

The deepest portions of the subducting plate get pulled under by the subducted plate. This is how the trench is formed. this process is at work when any subduction occurs. An oceanic-continental subduction occurs when ocean crust sinks under continental crust. The oceanic crust sinks because it is colder and denser than the continental crust. At these sites, deep-ocean trenches form, along with coastal mountains.