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U.S. Geological Survey Open-File Report 2004-1350

USGS OFR 04-1350 Figure 2.7

Figure 2.7. The distribution of 137Cs in the cores from the Sound. The 137Cs in cores 1, 2, and 3 are nominal well defined 1962-1963 peak. There is no defined 1962-1963 peak in core 4. In core 4 the 137Cs increases to an apparent maximum around 1980, then has slightly decreased. The decrease coincides with the instalation of weirs (Iivari, 1991). The concentrations in core 6 are significantly more than the shallower sites. In this core, there is no clear 1962-1963 peak, there is however a peak with a 210Pb age of 1967. Also there is a peak at 1972, which coincides with the floods from Hurricane Agnes. After this event there is a significant decline in 137Cs enriched sediment.

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