Size analysis of coarse grained, unconsolidated sediments requires large samples which are difficult to transport for laboratory analysis. A sieving and splitting device described here enables the sedimentologist to sieve coarse gravel samples ranging from 16 to 250 mm in the field and to split the sediment fractions < 16 mm into a convenient laboratory-sample of the required volume. With the aid of this device it is possible to sieve up to 1 ton of gravel daily enabling field determinations of grain size distribution, petrographic composition and morphometry.

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