"volcanic arc." YourDictionary, n.d. Web. 10 December 2018. <https://www.yourdictionary.com/volcanic-arc>.
volcanic arc. (n.d.). Retrieved December 10th, 2018, 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.