AGI DATA SHEET 16.1 Graph for Determining the Size of Sedimentary Particles by the Data Sheet Committee, aided by George V. Chilingar DARK PARTICLES d = 0.25 2 3 d = 0.5 4 d = 1.0 5 d = 2.0 6 d = 3.0 7 d = 5.0 8 d = 7.0 1 d = 0.1 d = 10 mm d = 15 mm Place sand grains or rock particles in the central part of the circle. Compare the size of the par- ticles with those on the graph with the aid of a magnifying glass. Record the corresponding number (1, 2, 3, 4, 5, 6, 7, 8) in notebook. For samples with particles of varying sizes, record the most common size first. AGI-DS-85