GRADISTAT: a grain size distribution and statistics package for the analysis of unconsolidated sediments
Simon J. Blott,Kenneth Pye +1 more
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TLDR
GRADISTAT as discussed by the authors is a computer program for the rapid analysis of grain size statistics from any of the standard measuring techniques, such as sieving and laser granulometry.Abstract:
Grain size analysis is an essential tool for classifying sedimentary environments. The calculation of statistics for many samples can, however, be a laborious process. A computer program called GRADISTAT has been written for the rapid analysis of grain size statistics from any of the standard measuring techniques, such as sieving and laser granulometry. Mean, mode, sorting, skewness and other statistics are calculated arithmetically and geometrically (in metric units) and logarithmically (in phi units) using moment and Folk and Ward graphical methods. Method comparison has allowed Folk and Ward descriptive terms to be assigned to moments statistics. Results indicate that Folk and Ward measures, expressed in metric units, appear to provide the most robust basis for routine comparisons of compositionally variable sediments. The program runs within the Microsoft Excel spreadsheet package and is extremely versatile, accepting standard and non-standard size data, and producing a range of graphical outputs including frequency and ternary plots. Copyright © 2001 John Wiley & Sons, Ltd.read more
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Use of indicators and pore volume-function characteristics to quantify soil physical quality
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References
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Brazos River bar [Texas]; a study in the significance of grain size parameters
Robert L. Folk,William C. Ward +1 more
TL;DR: In this paper, a bar on the Brazos River near Calvert, Texas, has been analyzed in order to determine the geologic meaning of certain grain size parameters and to study the behavior of the size fractions with transport.
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The Distinction between Grain Size and Mineral Composition in Sedimentary-Rock Nomenclature
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Journal ArticleDOI
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TL;DR: In this article, the use of five parameters that serve as approximate graphic analogies to the moment measures commonly employed in statistics is recommended, which are computed from five percentile diameters obtained from the cumulative size-frequency curve of a sediment.
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Grain Size Distributions and Depositional Processes
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