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Subduction zones or trenches.
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∙ 15y ago
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Where does Cooler older oceanic lithosphere sink?
Down into the mantle. At a depth of about 600 miles they become undetectable seismographicaly and are believed to have melted back into the mantle rock.
Does the oceanic lithosphere get older or younger?
Younger
What is the process by which new oceanic lithosphere is created as older materials are pulled away?
The subduction process
Is oceanic lithosphere lighter than continental lithosphere?
no
Im the place where older crust is destroyed because two plates converge or push together?
The place where two plates converge is called a convergent boundary. This results in a subduction zone where the heavier oceanic lithosphere is consumed into the mantle.
Where does Cooler older oceanic lithosphere sink?
Down into the mantle. At a depth of about 600 miles they become undetectable seismographicaly and are believed to have melted back into the mantle rock.
Why must the production and destruction of the lithosphere be going on at the same rate?
New lithosphere is constantly being produced at the oceanic ridges. Lithosphere is consumed at the subduction zones. A balance is maintained because older, denser proportions of oceanic lithosphere descend into the mantle at a rate equal to seafloor production.
Does the oceanic lithosphere get older or younger?
Younger
What cause seafloor spreading?
valconoes!
Does oceanic lithosphere get older or younger as you move closer to mid-ocean range?
Younger
What happens to old oceanic crust as molten materials rises from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
What happens to old oceanic crust as new molten material from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
What is the process by which new oceanic lithosphere is created as older materials are pulled away?
The subduction process
What happens to old oceanic crust as new molten material rises to the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
What happens to the old oceanic crust as new molten material rises from the mantle?
The older oceanic crust moves away from the spreading center and is eventualy subducted back into the mantle.
Is oceanic lithosphere lighter than continental lithosphere?
no
When does a part of oceanic plate sink into the mantle?
Usually when it meets another tectonic plate at a convergent plate boundary. If the oceanic plate converges with a continental plate the denser oceanic plate will be forced under the continental plate. If it converges with another oceanic plate the older (and therefore cooler and denser) plate will be forced under the younger plate.
