Figure F2. Textural classification scheme for siliciclastics, from Shepard (1954). Sand-, silt-, and clay-sized fractions are defined using the Wentworth (1922) grain-size scale. Numbers represent percent.

Figure F2. Textural classification scheme for siliciclastics, from Shepard (1954). Sand-, silt-, and clay-sized fractions are defined using the Wentworth (1922) grain-size scale. Numbers represent percent.