Banda Arc

This is due to the island representing the zone of fore-arc and continental collision which prevents volcanic activity from occurring.

[2] 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.

Although previous interpretations of the island of Timor have placed it as an accretionary wedge, it is in fact a mixture of Banda fore-arc volcanic rocks and the Australian continental margin.

The outer arc contains numerous islands, and its internal geologic structure contains young oceanic crust exclusively.