"volcanic arc." YourDictionary, n.d. Web. 18 April 2019. <https://www.yourdictionary.com/volcanic-arc>.
volcanic arc. (n.d.). Retrieved April 18th, 2019, from https://www.yourdictionary.com/volcanic-arc
A curved chain of volcanoes in the overriding tectonic plate of a subduction zone. Volcanic arcs form as the result of rising magma formed by the melting of the downgoing plate. They are curved because of the curvature of the Earth. The Andes mountains form a volcanic arc.