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Planktic and epibenthic foraminiferal δ 13 C records at Site PS62/015-3 (southwestern Greenland Sea) reveal a series of transient events of extreme 13 C depletion down to −6‰ during the period 90–40 ka. Scanning electron microscope studies of the ultrastructures of foraminiferal tests suggest that 13 C depleted specimens are affected by some 10–20% overgrowth by authigenic...
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