Explore the classification of clastic sedimentary rocks based on grain size in this 20-minute educational video. Delve into the grain size classes of sediment and detrital rocks, examining how transport and diagenesis influence grain size, porosity, and permeability. Learn to differentiate between sedimentary textures and structures, focusing on hydrodynamic, diagenetic, biogenic, and colloform textures. Discover how to classify rocks containing gravel, sand, silt, and clay, and understand the binary naming system for mixed grain sizes. Gain insights into depositional environments, transport mechanisms, and diagenesis processes, crucial for identifying potential oil and gas reservoirs. Enhance your understanding of sedimentary geology with this comprehensive overview of grain size classification and its implications in geological studies.