2020 5 2 ensp 0183 ensp Solved The Names Given To Clastic Sedimentary Rocks Are Mud sized clasts are very small less than 0 06 mm in diameter Sand grains are between 0 06 and 2 mm Gravel granule has a larger range from 2 to 4 mm Pebbles are 4 to 64 mm Cobbles are 64 to 256 mm Clasts larger than cobbles are classified as boulders