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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.
oceanic crust.
Eventually the oceanic crust, along with the magnetically aligned minerals contained within, will be subducted into the mantle.
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
the oceanic crust is 0.
Oceanic crust is mafic.
Oceanic crust is significantly denser.
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.
Continental crust.
oceanic crust