What is in a pebble shape?

Details What is in a pebble shape? What is in a pebble shape?

2006-07-03

arxiv.org/abs/cond-mat/0607061v1

Phys. Rev. Lett. 97, 028001 (2006)

Physics

Condensed Matter

Soft Condensed Matter

Phys. Rev. Lett. (to appear)

Scientific paper

10.1103/PhysRevLett.97.028001

We propose to characterize the shapes of flat pebbles in terms of the statistical distribution of curvatures measured along the pebble contour. This is demonstrated for the erosion of clay pebbles in a controlled laboratory apparatus. Photographs at various stages of erosion are analyzed, and compared with two models. We find that the curvature distribution complements the usual measurement of aspect ratio, and connects naturally to erosion processes that are typically faster at protruding regions of high curvature.

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