Abstract

Use of a small corer having a piston controlled by a screw-in drive shaft permits the collection of a series of thin (1.67 mm) slices of sand deposits. Several slices are required to penetrate a single coarse- or fine-grained lamina on foreshores of beaches. Grain-size analysis of the sand in each slice by settling tube was followed by computation of statistical parameters. The results show that the slices have a much broader range of median diameter, are better sorted, and are more positively skewed than are those for a composite core of the same sands. This means that investigations of beach-sand sources and of hydraulic conditions of erosion and deposition based upon sand texture may be better served by analysis of laminae than of total sample.

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