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Figure F2. Paleogeographic map for the North Atlantic at the beginning of the Paleogene. Note the narrow, and mostly shallow, connections between the North Atlantic and Arctic Basins. The presence of sediment drifts on J Anomaly Ridge suggests that there was strong deepwater formation somewhere in the basins adjacent to Greenland or Norway or that there was overflow from the Arctic itself. Expedition 342 drilling will sample these sediment drifts with the objective to understand the paleoceanography and climate implications of deepwater formation in the northern basins of the Atlantic.

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