Which geological outcome primarily results when denser oceanic crust subducts under less dense continental crust?

💡 Explanation

When oceanic crust subducts, dehydration melting of the mantle occurs because water is released from the subducting slab reduces the mantle's melting point, leading to magma formation that rises to form a volcanic arc. Therefore a volcanic arc results, rather than mid-ocean ridge, transform fault, or shield volcano which require different tectonic settings and mechanisms.

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