Banda Arc

The Banda Arc (main arc, Inner, and Outer) is a dual chain of islands in eastern Indonesia. It is the result of the collision of a continent and an intra-oceanic island arc. The presently active volcanic arc is mounted on stretched continental and oceanic crust whereas the associated subduction trench is underlain by continental crust, which has subducted deep enough to contaminate the volcanic arc with continental melts. The convergence of the Indo-Australian plates and Eurasia resulted in the formation of the Sunda and Banda island arcs. The transitional zone between the arcs is located south of Flores Island and is characterized by the change in the tectonic regime along the boundary. in the Timor Region.