Metamorphic rocks are prevalent __.
A) in continental crust in the middle of a plate, far away from any mountains or active faults
B) within volcanoes
C) in the oceanic crust away from the mid-ocean ridge
D) in intensely deformed portions of large mountain ranges, where the continental crust is subjected to high temperatures, pressures, and tectonic stress
E) nowhere on Earth, because regional metamorphism only occurred back when the mountains were forming

Question

Quizplus · Accepted Answer

Metamorphic rocks are formed when pre-existing rocks are subjected to high temperatures, pressures, and tectonic stress. This typically occurs in large mountain ranges where the continental crust is being intensely deformed, such as in the Himalayas or the Appalachian Mountains. Thus, option D is the best choice. Option A is incorrect because metamorphic rocks can also be found in orogenic belts (mountain-building areas) where active faults and deformation occur. Option B is incorrect because metamorphic rocks are not typically found within volcanoes, which are associated with igneous rocks. Option C is incorrect because the oceanic crust is mostly composed of igneous rocks and is less likely to undergo metamorphism. Option E is incorrect because regional metamorphism can occur at any time when the necessary conditions are present.

Metamorphic Rocks Are Prevalent __