The concentration of copper,lead, zinc and cadmium in shallow marine sediments,Cardigan Bay (Wales)

The concentration of copper, lead, zinc and cadmium in the acid-soluble fraction is presented for 86 seabed, 15 beach and 10 river samples of sediments from the southern Cardigan Bay area. Comparative results are presented for 8 samples of the Pleistocene sediments and 6 samples from the Aberystwyth Grits (Silurian) which outcrop along the shore line. The sediments from the Rheidol and Ystwyth rivers are strongly enriched in lead and zinc. The Pleistocene sediments are enriched in cadmium by a factor of 10 with respect to the seabed sediments in this part of Cardigan Bay.