Intro to World Geography
A volcanic arc is a chain of volcanoes that forms at a convergent plate boundary, typically where an oceanic plate is subducting beneath a continental plate. This geological feature arises due to the melting of the subducted plate, which generates magma that rises to the surface, creating a line of active volcanoes. Volcanic arcs often correlate with deep ocean trenches and are key indicators of tectonic activity in a region.
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