How does a subduction volcano form?
1 Answer
Jul 30, 2016
A subduction volcano forms when continental and oceanic crust collide. The oceanic crust melts and migrates upwards until it erupts on the surface, creating a volcano.
Explanation:
In order for a subduction volcano to form, you need a subduction zone. A subduction zone is where oceanic crust and continental crust collide. The oceanic crust is less buoyant and thicker than the continental crust, so it sinks. As it sinks, it travels 50-100 miles where it is so hot, the crust releases fluids trapped inside.
This fluid melts minerals in the material above it, creating basaltic magma. This migrates upwards until it reaches the surface and erupts, creating steep-sided volcanoes.
