Definition of island arc in English:

island arc

Line breaks: is¦land arc

noun

Geology
  • A curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side.
    More 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.

More definitions of island arc

Definition of island arc in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day skosh
Pronunciation: skəʊʃ
noun
a small amount; a little