PARTICLE SIZE CLASSIFICATION

Agrees with recommendations made by the American Geophysical Union Subcommittee on Sediment Terminology. The particle size classification is as follows: (1) Clay: 0.00024-0.004 millimeters (mm); (2) Silt: 0.004-0.062 mm; (3) Sand: 0.062-2.0 mm; and (4) Gravel: 2.0-64.0 mm.