Subduction in Earth is the process by which
A) dense material sank while lighter material rose to the surface during the early geological history.
B) molten lava oozes out between two tectonic plates that are spreading apart.
C) cool surface material sinks below other material at a tectonic plate boundary.
D) volcanic material flows from the deep interior to produce volcanic islands.

Question

Quizplus · Accepted Answer

Subduction is the process by which one tectonic plate sinks below another at a convergent boundary. The denser plate, usually an oceanic plate, sinks beneath the less dense plate, usually a continental plate, and moves into the mantle. This process leads to the formation of deep oceanic trenches and is responsible for most of the world's volcanic activity. Choices A, B, and D are incorrect descriptions of other geological processes.

Subduction in Earth Is the Process by Which