151 this, the plutoniun in the sample may not hava equilibrated with the tracer end the absolute concentrations of é 30+246 4G5 u and 238 Pu measured were considerec suspect end only the ratio of the two isotopes was used. This was Gone only because no additional sanole remained easily accessible anda no ctner analysis were available for data. In the case of o3k ‘ . these two sanptes, the SE concentration was celculated as explained above, only the 239+2405 hn and 239+240, 236 Pu/"~~Pu measurements were obtained from different subsamples of the original whole sediment s2mole. . z4 . - The concentrations of mar are also shown in Appendix Teble §. The concentrations of 2075, W55ey, > 137 Cs and 60 Ca measured in surface 210_,. The concentrations of measurec are shown in App2ndix Table 7. The methods and errors associatec with the results shown are explained in section 4.3. Po ¢210 sediments ara shown in Appendix Tahle 6. . Pb)