SOLAR SYSTEM

Detailed explanation-1: -At convergent plate boundaries, oceanic crust is often forced down into the mantle where it begins to melt. Magma rises into and through the other plate, solidifying into granite, the rock that makes up the continents. Thus, at convergent boundaries, continental crust is created and oceanic crust is destroyed.

Detailed explanation-2: -Continental – oceanic convergence When oceanic lithosphere and continental lithosphere collide, the dense oceanic lithosphere subducts beneath the less dense continental lithosphere. An accretionary wedge forms on the continental crust as deep-sea sediments and oceanic crust are scraped from the oceanic plate.

Detailed explanation-3: -The oceanic crust that forms in a divergent boundary is destroyed at a convergent boundary. When a continental crust and an oceanic crust meet at a convergent boundary the heavier oceanic crust is forced beneath the continental crust forming a subduction zone. The oceanic crust begins to melt as it subducts.

Detailed explanation-4: -Convergent boundaries–where crust is destroyed as one plate dives under another.

Detailed explanation-5: -New oceanic lithosphere is formed by frequent volcanic eruptions along the length of mid-ocean ridges and is pushed outward from them gradually. Old oceanic lithosphere is destroyed when it subducts or dives beneath adjacent plates at subduction zones.