The production of breccias and cataclasites is commonly proposed to result in power-law or log-normal probability distributions for fragment (grain) size. We show that both natural experimental examples, the common best fit complete are members Generalised Gamma (GG), Extreme Value (GEV) Pareto (GP) families; commonly, but not always, poor fits data. An hierarchical sequence, GG → GEV GP, emerg...