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What is meant by continental crust and oceanic crust?
They are two different types of crust. Continental crust is heavier than Oceanic crust, so when the two collide, the Continental crust 'subducts' under the Oceanic Crust. 'Crust' referring to the tectonic plates, the surface of the Earth we stand on.
Is subduction zone is where new crust is being formed?
No. As crust subducts under another plate, it is destroyed (Convergent Boundary). When plates pull apart, new crust is formed (Divergent Boundary).
What plate always subducts?
The heavier/denser oceanic plate subducts the lighter, less - dense continental plate.
What happens when heavier oceanic crust converges with lighter crust at a deep ocean trench?
The heavier (usually older and cooler hence more dense) oceanic crust normally subducts (is forced under) the younger less dense crust.
What happens when a tectonic plate carring a terrane subducts under a plate made of continental crust?
Stop tryin todo your homework on this!!
What is the primary reason why the oceanic crust subducts below the continental crust and not vice versa when they collide together?
The oceanic crust subducts beneath the continental crust due to its higher density. Oceanic crust is basaltic and has a specific gravity of 3.3. Continental crust is granitic and has an average specific gravity of 2.9.
When the ocean floor collides with a crustal plate what happens?
it subducts underneath the crustal plate
Why is oceanic crust always subducted underneath the continental crust?
Oceanic crust subducts under continental crust because it is denser. Continental crust's density is too low for it to be forced into the mantle.
Differences of the continental crust and oceanic crust?
Thickness - continental = much thickerDensity - oceanic crust is denser than continental, which is why the oceanic crust subducts under the continental at destructive plates boundaries.
What structure is formed when ocean crust subducts below continental crust?
Immediately at the subduction zone, an accumulation of sediment called an accretionary wedge is form.
What is meant by continental crust and oceanic crust?
They are two different types of crust. Continental crust is heavier than Oceanic crust, so when the two collide, the Continental crust 'subducts' under the Oceanic Crust. 'Crust' referring to the tectonic plates, the surface of the Earth we stand on.
Why does the oceanic crust move below continental crust?
The basaltic oceanic crust is more dense than the granitic continental crust. Therefore, when the two meet at plate margins, the oceanic crust usually subducts beneath the continental plate.
What is volcanic island arc?
I think its a chain of volcanoes form when oceanic crust subducts beneath other oceanic crust on an adjacent plate. Hope this helps (:
Is subduction zone is where new crust is being formed?
No. As crust subducts under another plate, it is destroyed (Convergent Boundary). When plates pull apart, new crust is formed (Divergent Boundary).
What plate always subducts?
The heavier/denser oceanic plate subducts the lighter, less - dense continental plate.
What happens when heavier oceanic crust converges with lighter crust at a deep ocean trench?
The heavier (usually older and cooler hence more dense) oceanic crust normally subducts (is forced under) the younger less dense crust.
What is crustal shortening?
Crustal shortening is the reduction of the size of the Earth's crust through tectonic activities such as those found at a convergent plate boundary. When an oceanic crust collides with a continental crust, the denser oceanic crust subducts beneath the continental crust. This causes the oceanic crust to be subducted back into the mantle and melt, reducing the size of the crust. When two continental crusts collide and neither subducts, the material is being pushed up towards Earth's surface, resulting in mountains like Mount Everest. This causes the crusts to reduce in size.
