Definition of island arc in English:

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island arc


A curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side.
Example sentences
  • The basalt-chert succession points more probably to an island arc developed on oceanic crust.
  • One model predicts tectonic wedging of the Solomon island arc beneath the Ontong Java plateau.
  • These units originated as an oceanic plateau possibly formed atop an island arc before being accreted onto the Cordilleran orogen.

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