The main way water gets into a subduction zone is by:
A) heating of the overlying continental crust
B) a decrease in pressure that causes melting
C) rain associated with eruptions in the island arc
D) seawater introduced into oceanic crust at the mid-ocean ridge, prior to subduction
E) all of these

Question

Quizplus · Accepted Answer

The main way water enters a subduction zone is through the oceanic crust that has absorbed seawater at mid-ocean ridges. This water is then carried into the subduction zone as the oceanic plate is subducted beneath another plate.

The Main Way Water Gets into a Subduction Zone Is