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when the crust increase the sea leavels beacem higher
At a volcanic island arc, an oceanic plate slides into the mantle and thus oceanic crust is destroyed. The volcanoes add material on to of the crust, but to not cause the crust to expand outward.
No, the oceanic crust is denser. That's why the land areas "float" so much higher than the ocean bedrock.
Oceanic crust sinking under a plate with continental crust
Oceanic crust is mafic.
the oceanic crust is 0.
Oceanic crust is significantly denser.
The lithosphere is composed of the oceanic and continental crust, along with the brittle uppermost mantle. The continental crust is mainly granitic, and the oceanic crust is primarily basalt.
The youngest parts of the Earth's crust are found in the oceanic crust. This crust is continuously being created at the mid-oceanic ridges.
oceanic crust
Continental crust is far older than oceanic crust.
It is not. The oceanic crust is thinner than the continental crust!