Petrology is the scientific discipline dedicated to the study of rocks, encompassing their origin, composition, and physical classification. This field analyzes the various rock types—igneous, sedimentary, and metamorphic—to determine the geological processes through which they formed. Techniques employed include the chemical analysis of mineral components, the measurement of physical characteristics, and the study of rock structures and textures. By investigating these material properties and formation histories, petrology provides critical insights into the Earth's deep history, understanding crustal evolution, tectonic activity, and the cycle of matter and energy within the planet's lithosphere.