Volcanic arc

A volcanic arc is a curving chain of volcanoes that typically forms along the boundary between two tectonic plates, usually at a convergent plate boundary where one plate is subducting beneath another. This process occurs when an oceanic plate descends into the mantle beneath a continental plate or another oceanic plate. As the subducting plate descends, it experiences increasing temperatures and pressures, leading to the melting of mantle rocks and the release of magma.