New statistical methods for the comparison and characterization of particle shape - supporting material by David Graham, Richard J. Gadsden

“…Shape (the relative lengths of three orthogonal axes) is a key property of sedimentary particles, providing information on provenance, transport history and depositional environment. However, the usefulness of shape data, including the ability to make robust comparisons between samples, has been constrained by the absence of a satisfactory definition of the mean shape for a sample of particles. …”
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