19. How would the rock cycle be affected in an area where tectonic plate motion is increasing the height and steepness of a moun
tain range? A. Erosion along the mountain slopes would increase B. Erosion along the mountain slopes would decrease. O C. The rocks on the mountaintop would turn to magma. D. Regional metamorphism would be prevented.
The rocks of the Ocean plates that get pushed further under the continental plates get melted and turned into igneous rocks. These melted rocks form volcanos along the edges of the subduction zones, such as the Pacific ring of fire. The melted rocks that do not make it to the surface form magma that cools into granite and other igneous rocks.