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Figure F58. Drilling mud contamination of core samples (µL drilling mud per g sample) plotted against depth, Site C0020. For core samples where PFC was below detection, we show the maximum possible drilling mud contamination, calculated based on the analytical detection limit of 8 × 10–12 g (8 pg) PFC in the injection volume (0.5 cm3), a PFC concentration in drilling mud of 100 µg/mL, and the amount of sample (g) taken for PFC analyses.

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