RADIOCHRONOLOGY OF SEDIMENTS FROM THE MEDITERRANEAN-SEA USING NATURALPB-210 AND FALLOUT CS-137

The (210)pb and C-137, profiles of sediment cores from two locations i n southern Spain, three locations in southern Turkey and two locations in northern Cyprus were determined by direct gamma-ray spectroscopy. Sedimentation rates were derived for all locations using Pb-210 data. The rates range from 139+/-0.12 cm.y(-1) (0.50+/-0.04 g.cm(-2).y(-1)) to 0.08+/-0.01cm.y(-1) (0.039+/-0.003 g.cm(-2).y(-1)). Except for one core, the Cs-137 profiles were also used to compute sedimentation rate s. The results are in good agreement with those of (210)pb values. The results of the Constant Initial Concentration and Constant Rate of Su pply dating models are in good agreement with each other. The flux of unsupported Pb-210 varies between 0.11 +/- 0.03 to 0.74 +/- 0.01 pCi.c m(-2). The average depositional flux was found to be considerably lowe r for cores from the Eastern Mediterranean.