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New data on age determinations based on radiocarbon and on the distribution of potassium, radium, and thorium in bottom sediments of the Black Sea are presented. The material was sampled during Cruise 42B of D/V Glomar Challenger in the Black Sea. Dating by C was done separately on the organic and the inorganic carbon fraction for samples from Sites 380 and 381. It has been established that the upper deposits have an age older than assumed. In samples from Site 381 from a depth of 3 to 114 meters, K(K), Ra(Bi), and Th(Tl) were determined with the aid of a gamma spectrometer. It is shown that correlations exist between Th and K.

Radiocarbon and Radioactive Elements in Sediments of the Black Sea