The fluvial gravel output of the Laverde River feeding the Bianco Beach is well defined in terms of petrographic composition, sphericity, and roundness.
Strong attrition occurs and the amount of less resistant gneiss decreases.
Instead, redistribution and redeposition according to grain size and shape dominates the cross-shore gravel movement with a decrease of sphericity from the offshore to the backshore. Net longshore transport is still northward, sphericity again remaining almost unchanged. By retaining its provenance signal, sphericity fails as a meaningful tool for the recognition of geological environments along the Calabrian coast. This inherited sphericity signature of the fluvial output is conserved along the beach and is differentiated only in the cross-shore direction. Only high-energy events move the entire gravel population to yield homogeneous rounding.