Elongation, flatness and compactness indices to characterise particle form

A century after the first attempts of Wentworth to characterise shape cobbles, our understanding particle morphology is still expanding. plethora indices has been proposed in literature individual particles. This study aims shed light on merits and limitations currently used elongation, flatness compactness, adopting a unified classification framework. Second, new are address identified shortcomings. Third, system derived from illustrated. It shown overcomes misclassification range particles that incorrectly classified as bladed Zingg system.