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island arc


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An arcuate island chain, mostly of volcanic origin, formed when oceanic crust plunges into the mantle where it undergoes subduction. The magma thus formed creates a chain of submarine volcanoes—eventual islands; see Jicha et al. (2006) Geology 34, 8 on magma flow in the Aleutian Island arc. See also Takahashi et al. (2007) Geology 35, 3.

Subjects: Earth Sciences and Geography.


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