The distribution of heavy metals in streambed sediment from an oil-producing region in
Nigeria has been examined between the two distinct seasons (dry and wet). The highest mean concentration during
the dry season (wet season in brackets) was 2083.3ｱ355.5 (2264.2ｱ347.3)mg/kg Cu and 0.16ｱ0.06
(0.19ｱ0.09)mg/kg Zn respectively. With similar patterns at both seasons, the order of increasing concentration
was Zn
