Answer:
An ocean-ocean convergent boundary occurs location where two oceanic plates come together and the denser plate sinks, or subducts, beneath the less dense plate, forming a deep ocean trench. Chains of volcanoes, called island arcs, form over subduction zone melting occurs where the subducting plate reenters the mantle.This occur when two oceanic plates colliding with each other. Even though they are both oceanic, it is believed one of them are far more denser than the other and causes the subduction of the denser plate. Subduction of one plate creates trenches, volcanoes, earthquake and might produce tsunami on the surface.
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