Grain-size fractions were calculated: I) the clay (< 2 µm), II) silt (2-63 µm), III) finer sands (63-250 µm) which included the very fine sand (63-125 µm) and fine sand (125-250 µm), and IV) coarser sands (250-2000 µm) which included medium sand (250-500 µm), coarse sand (500-1000 µm) and very coarse sand (1000-2000 µm) fractions.