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volcanic arc
volcanic arcn. A usually curved chain of volcanoes occurring on the overriding tectonic plate of a subduction zone, formed by magma that rises from the melting of the descending plate.vol·can·ic arc (vŏl-kăn′ĭk) A usually curved chain of volcanoes located on the margin of the overriding plate at a convergent plate boundary.volcanic arc
volcanic arc[väl‚kan·ik ′ärk] (geography) island arc |