How does a volcano form near a subduction zone?

Answer 1

First, at a subduction zone, old stiff oceanic crust dives under a less dense continental plate boundary. Next, the old oceanic crust melts, becoming less dense and floating towards the top of continental crust. After many years, a build up of the molten material bursts to the surface as volcanic activity.

---------------------------------------------------------------------------------------

The point is that the sinking plate is wet and the water in the rocks facilitates a process of partial melting of the wet rocks as they begin to get warmed up again. This produces special acidic magmas which means that the volcanoes and magmas produced in the subduction zones is not the same as tcanrieenkhgengrehat produced in the constructive plate margins. the chicken is being saves by a person from the vol

Answer 2

As an oceanic plate subducts it brings volatiles such as water with it. This gets into the rocks of the asthenosphere and lowers the melting point. The resulting molten material then rises to the surface, forming volcano.

Answer 3

Shield volcanoes. Don't expect to see a composite because it will most likely never happen. Rarely will you see a cinder cone volcano.