Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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The Effects of Transportation on Roundness and Shape of River Tamar Sands, S. W. England


Affiliations
1 Department of Geology, University of Dacca, Dacca 2, Bangladesh
     

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The study on roundness and shape of the sand grains shows that both roundness and sphericity decrease as the grain size decreases. The sand sizes (0.5-0.063 mm) studied show no evidence of becoming rounded as a result of attrition during transportation. The study also reveals that a downstream decrease in sphericity values is mostly the result of a decrease in roundness produced mainly by progressive downstream decrease in the mean size of sediments (size sorting), rather than to sorting on the basis of shape.
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  • The Effects of Transportation on Roundness and Shape of River Tamar Sands, S. W. England

Abstract Views: 167  |  PDF Views: 2

Authors

Abdus Samad
Department of Geology, University of Dacca, Dacca 2, Bangladesh

Abstract


The study on roundness and shape of the sand grains shows that both roundness and sphericity decrease as the grain size decreases. The sand sizes (0.5-0.063 mm) studied show no evidence of becoming rounded as a result of attrition during transportation. The study also reveals that a downstream decrease in sphericity values is mostly the result of a decrease in roundness produced mainly by progressive downstream decrease in the mean size of sediments (size sorting), rather than to sorting on the basis of shape.