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Does continental lithosphere contain more mafic rocks than oceanic lithosphere?
No, oceanic lithosphere contains more mafic rocks compared to continental lithosphere. Oceanic lithosphere is mainly composed of basalt, which is a mafic rock, whereas continental lithosphere is composed of a variety of rock types, including granitic rocks which are more felsic in composition.
Why is oceanic lithosphere subducted while continental lithosphere is not?
The density of the continental (granitic) lithosphere is lower than oceanic (basaltic) lithosphere. Consequently, due to buoyancy, the continental crust rides above the oceanic lithosphere and thus is not subducted. However, it is thought that pieces of the continental lithosphere break off and are subducted along with the oceanic lithosphere.
Why is oceanic lithosphere subducted during and oceanic continental collision where as the continental plate is not?
Oceanic lithosphere is denser than continental lithosphere, so it is more likely to be subducted during a collision. The downward force exerted by the dense oceanic plate causes it to sink beneath the less dense continental plate. Furthermore, oceanic lithosphere is typically thinner and more malleable, making it easier to be forced beneath the continental lithosphere.
How is continental lithosphere different from oceanic lithosphere?
Continental plates are thicker and less dense. Continental plates are mainly granitic in composition. Oceanic plates are mainly basaltic in composition. The rock of continental plates is on average, much older than the rock of the oceanic plates. The oceanic plate underlies the oceans, and the continental plate makes up the land masses. Continental plates do not subduct at convergent plate boundaries.
Is continental crust darker in color than oceanic or lighter?
Continental crust is generally lighter in color than oceanic crust. This is because continental crust is composed of lighter-colored rocks such as granite, which contain lighter minerals like quartz and feldspar. In contrast, oceanic crust is made up of darker-colored rocks like basalt, which contain heavier minerals like pyroxene and olivine.
Why does oceanic lithosphere sink beneath convergent lithosphere at convergent boundaries?
As odd as it is to think of things this way, continental lithosphere is more buoyant than oceanic lithosphere. The oceanic lithosphere is more dense.
Why does oceanic lithosphere sink beneath continental lithosphere at convergent boundary's?
As odd as it is to think of things this way, continental lithosphere is more buoyant than oceanic lithosphere. The oceanic lithosphere is more dense.
Why does oceanic lithosphere sinks beneath continental lithosphere at convergent boundaries?
As odd as it is to think of things this way, continental lithosphere is more buoyant than oceanic lithosphere. The oceanic lithosphere is more dense.
How is continental lithosphere different oceanic lithosphere?
Continental lithosphere is thicker and less dense than oceanic lithosphere. Continental crust is primarily composed of granitic rock while oceanic crust is composed primarily of basaltic rock.
Does continental lithosphere contain more mafic rocks than oceanic lithosphere?
No, oceanic lithosphere contains more mafic rocks compared to continental lithosphere. Oceanic lithosphere is mainly composed of basalt, which is a mafic rock, whereas continental lithosphere is composed of a variety of rock types, including granitic rocks which are more felsic in composition.
Why is oceanic lithosphere subducted while continental lithosphere is not?
The density of the continental (granitic) lithosphere is lower than oceanic (basaltic) lithosphere. Consequently, due to buoyancy, the continental crust rides above the oceanic lithosphere and thus is not subducted. However, it is thought that pieces of the continental lithosphere break off and are subducted along with the oceanic lithosphere.
Oceanic crust is lighter than the continental crust?
No, the oceanic crust is denser. That's why the land areas "float" so much higher than the ocean bedrock.
Why is oceanic lithosphere subducted during and oceanic continental collision where as the continental plate is not?
Oceanic lithosphere is denser than continental lithosphere, so it is more likely to be subducted during a collision. The downward force exerted by the dense oceanic plate causes it to sink beneath the less dense continental plate. Furthermore, oceanic lithosphere is typically thinner and more malleable, making it easier to be forced beneath the continental lithosphere.
How is continental lithosphere different from oceanic lithosphere?
Continental plates are thicker and less dense. Continental plates are mainly granitic in composition. Oceanic plates are mainly basaltic in composition. The rock of continental plates is on average, much older than the rock of the oceanic plates. The oceanic plate underlies the oceans, and the continental plate makes up the land masses. Continental plates do not subduct at convergent plate boundaries.
Why is an oceanic plate always subducted but not a continental plate?
Continental plates are lighter (less dense) than oceanic plates.
Is continental crust darker in color than oceanic or lighter?
Continental crust is generally lighter in color than oceanic crust. This is because continental crust is composed of lighter-colored rocks such as granite, which contain lighter minerals like quartz and feldspar. In contrast, oceanic crust is made up of darker-colored rocks like basalt, which contain heavier minerals like pyroxene and olivine.
What types of crust can be found in the lithosphere?
The lithosphere can have two main types of crust: continental crust and oceanic crust. Continental crust is thicker, older, and less dense than oceanic crust. Oceanic crust is thinner, younger, and denser, primarily composed of basaltic rocks.
