A curved chain of volcanic islands located at a tectonic plate margin, typically with a deep ocean trench on the convex side.
- 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.
For editors and proofreaders
Syllabification: is·land arc
Definition of island arc in:
What do you find interesting about this word or phrase?
Comments that don't adhere to our Community Guidelines may be moderated or removed.