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Trenches occur at convergent boundaries when one tectonic plate which is more dense, is pushed beneath another tectonic plate that is less dense. This process is called subduction.
Usually where divergent boundaries in the earth's crust are. When faults move apart, they create trenches.<-- no divergent boundaries in the ocean create mountain ridges not trenches
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Deep ocean trenches are surficial evidence for?
Sinking of oceanic lithosphere into the mantle at a subduction zone.
What causes oceanic trenches?
Deep ocean trenches are made where one plate is submerged under another
Why are Oceanic trenches found only in association with subduction zones?
The trenches are evidence that one of the colliding plates is moving beneath the other. As the two plates move together, one gets pushed below the other. The place where this sinking/bucking occurs creates a deep trench. The deepest of which is Marianas trench about 7 miles deep.
Which basin contains many deep sea trenches?
the Pacific Ocean with a few in the Indian Ocean.
Is it true that At deep-ocean trenches conduction allows oceanic crust to sink back into the mantle?
No, subduction does.
Deep-oceanic trenches are most abundant around the rim of the?
Deep-oceanic trenches are most abundant around the rim of the Pacific. Deep ocean trenches are surficial evidence for sinking of oceanic lithosphere into the mantle at a subduction zone.
Oceanic crust returns to the mantle at deep ocean trenches which are?
rocks
When two oceanic plates collide it creates?
when two oceanic plates collide they create a deep-ocean trench, at deep-ocean trenches subduction occurs.
What is the land forms produced underwater caused by the movement of oceanic plate?
Mid oceanic ridges and deep sea trenches.
At deep-ocean trenches what allows oceanic crust to sink back into the mantle?
Subduction.
What is the process where oceanic crust is sinking under continents at deep ocean trenches?
Sinkation
Are oceanic plates only made up of oceanic crust?
yes but oceanic crust is younger than continental crust because of deep sea trenches
Deep ocean trenches are surficial evidence for?
Sinking of oceanic lithosphere into the mantle at a subduction zone.
What causes oceanic trenches?
Deep ocean trenches are made where one plate is submerged under another
Are the oldest rocks of the oceanic crust found in deep ocean trenches far away from active mid-ocean ridges?
That is normally where they would be found; farthest away from the point at which they were initially formed.
What forms when continental crust converge with oceanic crust?
Deep sea trenches, Mountain ranges, Volcanoes, and Earthquakes.
What is the region where oceanic lithosphere sinks into the asthenosphere?
deep ocean trenches
