Abstract

The scheme adopted follows the Wentworth classification with respect to grain size limits for gravel, sand, silt, and clay-sizes, and uses the major component for the principal name with the lesser components applied as modifiers in order of increasing importance. A sediment consisting of 30% gravel, 20% sand, 40% silt, and 10% clay would be called a clayey-sandy-gravelly silt. Where further precision is desirable the actual percentages are given as subscripts: clayey 10 -sandy 2O -gravelly 30 -silt 4O . Where percentages are below 5%, the component concerned is omitted from the name.

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