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Figure F8. Subsidence estimates for North Atlantic Deep Sea Drilling Project (DSDP) records, with an interpretation of calcite compensation depth (CCD) history. Red dashed lines report the calculated subsidence history of the base of J Anomaly Ridge, DSDP Site 384 on the crest of J Anomaly Ridge, and the tops of the Southeast Newfoundland Ridge (SENR) seamounts. Seismic data suggest, in contrast to the reconstructed CCD record, that carbonate sediments extend nearly to the base of J Anomaly Ridge during the Paleogene (shown in the yellow band). Expedition 342 will core a depth transect in Paleogene sediments to refine our understanding of CCD history.

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