C. Metamorphic rocks are made of other rocks that have been modified under high pressure and temperature into new forms. Crustal movements associated with lithospheric plate boundaries generate lots of heat and pressure, as well as deform the crust. This heat and pressure deforms and modifies the original crystalline structure of the rock. Occurs along edges of plate boundaries, and in rocks surrounding magma chambers. Both igneous and sedimentary rocks can be metamorphosed.
Metamorphic rocks are often very hard and resistant.
Do not erode as quickly as sedimentary or igneous rocks. Form bedrock core of many major mountain ranges. D. Thanks to lithospheric plate collisions, surface rocks are constantly being recycled as they are plunged into the mantle and melted. This allows new igneous rocks to form, and provides the material to renew the crust of the earth. Igneous or metamorphic rocks eroded to form sedimentary rocks.