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| | Since the **lysocline** has always been deeper than 3,500m during the last 200 ka (1ka † 1000 years) (Curry and Lohmann, 1990), we assume that the CaCO3-flux supplied to the deeper locality EW9209 1JPC is comparable to the one into the shallower sediment of GeoB 1523-1. |

| | Supposing that the degree of CaCO3 dissolution increases linearly with depth below the **lysocline** level and that the CCD has remained constant at 4,600m depth (Berger, 1977), we evaluated the variations of the depth of the **lysocline** for the last 200 ka. |

| | The observed periodicity of the **lysocline** variation at the Ceará Rise exhibits a correlation with the variability of the Composite Preservation Index of the CaCO3 in the Southern Ocean (Howard and Prell, 1994). |

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