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Adjustment coefficients for planimetric analysis of the granulometry of coarse-grained sediments

Pisarska-Jamroży Małgorzata, Kossowski Tomasz, Jamroży Jerzy

Geologos

2011

Vol. 17, No. 4

221--226

The relationship between results from granulometric analyses of by sieving and by planimetry was investigated by numerical simulation of cubes filled with boulders, cobbles and pebbles. Cross-sections through the sediment were simulated and compared with photos of an actual outcrop wall. Volumes estimated on the basis of planimetric analysis using the cross-sections were compared with sieve analyses, thus allowing to determine adjustment coefficients. The coefficients for pebbles and cobbles have a small standard error, but are larger for boulders, which might be a consequence of too small areas formed by the cross-sections.