Petrology is a branch of geology that studies the formation, composition, and structure of rocks. Synonyms for the word "petrologic" include petrographical, lithological, mineralogical, and geologic. Petrographical describes the study of rock texture and mineral content. Lithological refers to the study of rock types and their characteristics. Mineralogical is focused on the study of minerals in rocks. Geologic describes the study of the Earth's crust and its evolution. These terms are often used interchangeably with petrologic to describe the various aspects of rocks and their formation, providing a broad understanding of the geological processes that shape our planet.