👉 Datolitic is a term used in geology to describe rocks that are composed of silicate minerals. These minerals are found in granites, which are formed by rock erosion and weathering over millions of years. The term "datolitic" comes from the Latin word "datalogus," meaning "sandstone." Datolitic rocks are often associated with marine environments as they contain fossils and other organic material that were present during the times when these rocks were made.