Metamorphic Petrology is the study of metamorphic rocks, which are formed from existing rocks that undergo changes due to heat, pressure, and chemically active fluids. This process, known as metamorphism, alters the mineral composition and texture of the original rock, resulting in new rock types. Common examples of metamorphic rocks include schist, gneiss, and marble. Geologists analyze metamorphic rocks to understand the conditions under which they formed. They examine features such as foliation, which is the alignment of minerals, and the presence of specific minerals that indicate temperature and pressure conditions. This information helps in reconstructing the geological history of an area.