Nomograms for morphometric gravel analysis

Most methods of quantitative morphometric gravel analysis are very time consuming. To alleviate this situation, the author has developed three nomograms for plotting the Gailleux indices of roundness, flatness and dissymmetry. These nomograms enable results to be read off automatically in classes, so that the individual index values need not be ranked or grouped into classes separately, thereby allowing plotting without calculation. The nomograms are very versatile in that they are readily modified to suit individual requirements. The nomograms enable results to be obtained instantly in the field, and should prove useful to anyone using the Cailleux indices.