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Journal Article
The Math of Beach Pebble Formation
2023
Overview
More than 2,300 years ago, Aristotle pondered the shapes of beach stones and proposed that the abrasion of a pebble is more rapid at locations farther from its center, because those regions can receive greater abrasive impulses. He concluded that beach stones evolve toward spheres. But the pebbles used in designs from Stone Age ceremonies (see images to the right) to modern art are not spherical at all. Rather, they have the familiar oval shape of the stones shown in the image on page 170 of a beach on Banks Peninsula in New Zealand. The first laboratory studies of the shapes of beach stones evolving under frictional abrasion began in the 20th century with the experimental and theoretical work of Robert Strutt, the fourth Lord Rayleigh (son and biographer of the third Lord Rayleigh, who was awarded a 1904 Nobel prize for his discovery of argon).
Publisher
Sigma XI-The Scientific Research Society
