The lithologic features, based on thin section studies, are summarized in Tables T1, T2, T3, T4, and T5. The silicoclastic samples were classified on the grounds of clast/matrix ratio and clast size. The nature of the lithic clasts is reported, together with bioclasts, organic matter occurrence, the description of matrix or cement, the presence of sedimentary structures, grainsize, roundness and sorting of grains, and evidence of alteration.