What is one situation in which a metamorphic rock results?
A) A volcano ejects a rock and it cools on the surface of the earth.
B) A sedimentary rock experiences the physical elements of the earth's surface.
C) An igneous rock breaks down to fragments and then experiences heat and pressure.
D) A sedimentary rock experiences intense heat and pressure.

Question

Quizplus · Accepted Answer

Metamorphic rocks form when existing rocks (igneous, sedimentary, or other metamorphic rocks) are subjected to intense heat and pressure, which causes them to recrystallize and form new minerals and textures. This process occurs deep in the Earth's crust and is often associated with mountain building or tectonic activity. Sedimentary rocks (option B) can sometimes be involved in the process of metamorphism, but they do not result in metamorphic rock formation by themselves. Option A describes the formation of an igneous rock, and option C describes the breakdown of an igneous rock, neither of which necessarily leads to metamorphism.

What Is One Situation in Which a Metamorphic Rock Results