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Figure F69. Chemical parameters determined in headspace and interstitial water samples, Hole U1421A. A. Alkalinity. B. pH. C. Sulfate. D. Ammonium. E. Bromide. F. Methane. G. Ethane. H. Silica. I. Salinity. J. Chloride. K. Sodium. Seawater values in I and J based on analyses of surface seawater sampled at Site U1421.

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