Metamorphic rocks are produced by the metamorphism (applying heat and pressure) of sedimentary rocks, igneous rocks, or even pre-existing metamorphic rocks.
(Metamorphic rocks; are produced; by the metamorphism (applying heat and pressure) of sedimentary rocks, igneous rocks, or even pre-existing metamorphic rocks) (the metamorphism; applying; heat and pressure)
Metamorphic rocks the metamorphism
are produced applying
by the metamorphism (applying heat and pressure) of sedimentary rocks, igneous rocks, or even pre-existing metamorphic rocks
heat and pressure