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Calderas
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Is the oceanic lithosphere denser?
No. Oceanic plates are denser than conitnental plates.
What can form when one oceanic plate subducts under another oceanic plate?
Tectonic
How do island arcs form?
Everytime a volcano erupts, the magma gets higher and higher everytime it hardens. This causes an island arc
What occurs when dense oceanic plates collide with a continental plate?
The oceanic plate subducts under the continental because it is denser. The Andes are being formed in this way and the Himalayas started that way also.
Why does oceanic lithosphere sink at subduction zones but not at mid ocean ridges?
oceanic lithosphere sinks at subduction zones but not at mid ocean ridges because at subduction zones the oceanic lithosphere is subducted, or sinks, under another plate. Oceanic Lithosphere sinks at subduction zones which are usually at convergent boundaries, but at mid-ocean ridges the plates are actually separating not coming together
Is the oceanic lithosphere denser?
No. Oceanic plates are denser than conitnental plates.
Is the lithosphere thinner under the oceanic or continental crust?
the lithosphere is thinner under the oceanic crust
What can form when one oceanic plate subducts under another oceanic plate?
Tectonic
Do the pacific plate have more oceanic lithosphere or more continental lithosphere?
Oceanic. Most of the Pacific plate is under the Pacific Ocean.
Where slab of oceanic lithosphere are subducted under continental lithosphere?
destuctive plate margin
What happens when continental and oceanic lithospheres collide?
When oceanic lithosphere and continental lithosphere collide, the continental lithosphere may be obducted over the oceanic lithosphere or the oceanic lithosphere may be subducted under the continental lithosphere. The latter is thought to be more common. This subduction and obduction generally results in tectonic activity such as volcanoes and earthquakes.
How does plate movement occur in trenches?
That's a hotly debated question among scientists. We do know that trenches form where oceanic lithosphere subducts under continental lithosphere. as to what drives the plates together, it is probably continents being moved by the currents of the partially liquified asthenosphere below it. Many scientists think that it is the weight of the oceanic lithosphere being pulled by gravity and pushed from the higher mid-ocean ridges. To me that seems a bit like a chihuahua pulling a house.
When an ocean plate collides with a continental plate it does what?
It subducts under the continental plate because the oceanic plate is denser.
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.
How do island arcs form?
Everytime a volcano erupts, the magma gets higher and higher everytime it hardens. This causes an island arc
Why does oceanic lithosphere sink at subduction but not at mid ocean ridges?
oceanic lithosphere sinks at subduction zones but not at mid ocean ridges because at subduction zones the oceanic lithosphere is subducted, or sinks, under another plate. Oceanic Lithosphere sinks at subduction zones which are usually at convergent boundaries, but at mid-ocean ridges the plates are actually separating not coming together
What is the effect when an oceanic plate meets a continental plate?
the oceanic plate subducts under the continental plate and then melts in the mantle and often will create volcanos along the conitinental plate.\
