Numerous software packages are available for the production of such diagrams.Īn alternative type of triangular diagram was proposed by Sneed & Folk (1958) for the representation of particle shape (Fig.
In the Earth Sciences, a common application is the representation of the proportions of sand, silt and clay in a sample. Tri-plot is a Microsoft® Excel spreadsheet for the preparation of triangular (ternary) diagrams for particle-shape and tri-variate data.Ĭonventional triangular diagrams are used to represent tri-variate data in which the three variables represent proportions of a whole (Fig.
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