A volcanic island arc forms when _______________.
A)an oceanic plate subducts beneath continental lithosphere
B)an oceanic plate subducts beneath another oceanic plate
C)continental lithosphere subducts beneath an oceanic plate
D)two oceanic plates collide

Question

Quizplus · Accepted Answer

A volcanic island arc forms when an oceanic plate subducts beneath another oceanic plate. This is because the subducting plate is forced down into the mantle, causing melting and magma generation, which forms a volcanic island arc on the overriding plate. This process is also known as back-arc spreading.

A Volcanic Island Arc Forms When _______________