A quarry is an excavation site used to extract solid, natural construction materials, such as stone, sand, gravel, and aggregate. Geologically, these sites expose subsurface formations that contain suitable raw materials for industrial use. The process involves removing overburden—the soil and rock layers lying above the desired material—and then employing specialized techniques to separate and extract the desired strata. These materials are subsequently processed through sorting and washing systems to meet precise quality standards for use in civil engineering, construction, and manufacturing industries. The availability and composition of materials at a given quarry site are dictated by regional geology and lithology.