Rock samples are important objects of geological research, and through the analysis of rock samples, scientists can reveal the history, structure and evolution of the earth. Rock specimens are usually classified according to their composition, formation process and structural characteristics, which are mainly divided into three categories: igneous rock, sedimentary rock and metamorphic rock.
Igneous rocks are formed by the cooling and solidification of liquid magma, such as granite and basalt. They reveal the workings and tectonics of the Earth's interior; Sedimentary rocks are formed by the compaction and consolidation of sediments in water bodies, such as sandstone and limestone, which record ancient environmental and climate changes. Metamorphic rocks are the result of metamorphism of primary rocks under high temperature and pressure, such as marble and gneiss, reflecting the history of crustal movement.
Rock specimens not only provide basic data for geological research, but also play an important role in mineral exploration, soil research and ecological protection. Through the analysis of rock samples, scientists can gain insight into the evolution of the Earth and provide scientific basis for resource development and environmental protection.