If two oceanic plates collide at a relatively fast speed, and one is much older and cooler (therefore more dense) than the other, what will happen?
A) A deep trench will form.
B) Continental mountains will form.
C) Large earthquakes will occur.
D) A volcano will erupt. .

Question

Quizplus · Accepted Answer

When two oceanic plates collide, the older and cooler plate will be more dense and therefore will subduct (sink) beneath the younger and warmer plate. As the plate sinks, it creates a deep trench along the subduction zone where the collision occurs. This can also lead to the formation of volcanic arcs on the overriding plate as magma rises up from the subducting plate. Therefore, option A is the best choice as it describes the formation of a deep trench.

If Two Oceanic Plates Collide at a Relatively Fast Speed