What happens as mantle rock rises?
A) It cools and sinks again almost immediately.
B) It cools and contracts.
C) It expands at decreased pressure.
D) It melts and continues to push upward.

Question

Quizplus · Accepted Answer

As mantle rock rises, it experiences decreased pressure, which causes it to expand. This expansion can lead to the formation of fractures and cracks, which can further facilitate the ascent of mantle material. However, the rock does not necessarily melt and continue pushing upward unless it reaches a point where the temperature and pressure are such that melting can occur.

What Happens as Mantle Rock Rises