Figure F4. A. Classification of the whole-rock composition scheme used for Leg 189. Fifty percent of whole-rock composition = lithology; 10%-25% of whole-rock composition = minor modifier, and >25%-50% of whole-rock composition = major modifier. If whole-rock composition is >50% siliciclastic, siliciclastic texture to determine the lithology is applied. B. Textural classification scheme for siliciclastics, modified from Shepard (1954), by subdivision of the central triangular field into sandy clay, silty clay, sandy silt, clayey silt, clayey sand, and silty sand.