A measure of sedimentary particle shape, H, is synthesized from the following particle parameters: Reynolds number, a friction component, a form factor, an angularity factor, longest dimension, intermediate axis, short axis, nominal diameter, surface area, and an average of angles concave to the C-axis. Theoretical studies of the effectiveness of H in a Stokes regime and in a turbulent regime suggest that H is useful as a measure of the effect of shape upon settling velocity. Corrections required for effects of particle asymmetry and alternate possible settling orientations are not included in calculations for H.

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