Sorting (1) Sorting identifies sediment in terms of the variability in the size of its particles. Poorly sorted (wide range of particle size), Well sorted (range is small). Changes of grain size typically result from fluctuations in the velocity of the transporting agent, such as water or wind.Sorting (1) ◼ Sorting identifies sediment in terms of the variability in the size of its particles. ◼ Poorly sorted (wide range of particle size), ◼ Well sorted (range is small). ◼ Changes of grain size typically result from fluctuations in the velocity of the transporting agent, such as water or wind