Mn concentration ranged between 136.05 and 312.11 mg/kg and mean value was 228.18 mg/kg. The mean
value of Mn was less than world surface rock average and shale concentration as geochemical background level,Table 5. Mn mean value exceeded USEPA sediment quality guidelines. Except S8 and S9, others showed higher values during winter than spring, Figure 3(h).