Question 1. Explain subduction zones:? Can someone answer this question to me? T

Question

Question 1. Explain subduction zones:?

Can someone answer this question to me? The answer should be taken from this picture.

Rocks are hard, consolidated mineral matter. Poets may characterize them as permanent and immutable, but scientists know that rocks are constantly changing in a great geologic cycle The cycle starts with magma, molten matter from deep within the Earth. As soon as igneous rocks formed from magma are exposed on the Earth's surface, they begin to change. They may weather into particles which are carried away, deposited, and compacted into new kinds of sedimentary rocks. Or they may be moved with the Earth's plates to subduction zones where they sink and are remelted into magma. Igneous or sedimentary rocks may be changed by heat and pressure within the Earth to metamorphic rocks. These, when exposed on the surface, enter the great cycle in their turn. The Earth retains its size through this recycling although its surface is constantly weathered and renewed in the endless cycle. Blusmations by Lirsyd K Townsend

Explanation / Answer

The given picture briefly explains the rock cycle

We know that continental crust is less denser than that of the oceanic crust. In case of convergent plate boundaries, if one of the plate is significantly less denser than the other then the denser plate will be automatically forced to move ‘underneath’ the less denser plate. This forms the subduction zone.

The rocks formed when brought to the subduction zone sinks into the mantle and causes the volcanism to occur which makes up new crust.Simply we can say that volatiles which are water, gases, and few other low melting point minerals normally melt and the remaining part just gets reincorporated into the upper mantle of the earth, which we can say as "remelted into magma"

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