Metamorphic rocks are a type of rock that has been transformed by heat, pressure, or chemically active fluids. These rocks were originally formed from other types of rocks, such as sedimentary or igneous rocks, but have undergone a process called metamorphism, which changed their mineral composition, texture, and overall appearance. Metamorphic rocks are typically harder, denser, and more crystalline than the original rocks from which they formed. Examples of metamorphic rocks include marble, slate, schist, and gneiss.
