Figure F16. Profiles of chemical constituents in interstitial waters from Site 1257. Data from DSDP Site 144 are given for comparison (Waterman et al., 1972; Presley et al., 1973). Shaded intervals = approximate depth interval of Unit IV, the black shale sequence. ICP-AES = inductively coupled plasma–atomic emission spectroscopy. A. Salinity. B. Chloride. C. Sodium. D. Potassium. E. Alkalinity. F. Sulfate. G. Ammonium. H. Barium. (Continued on next page.)

Figure F16. Profiles of chemical constituents in interstitial waters from Site 1257. Data from DSDP Site 144 are given for comparison (Waterman et al., 1972; Presley et al., 1973). Shaded intervals = approximate depth interval of Unit IV, the black shale sequence. ICP-AES = inductively coupled plasma–atomic emission spectroscopy. A. Salinity. B. Chloride. C. Sodium. D. Potassium. E. Alkalinity. F. Sulfate. G. Ammonium. H. Barium. I. Calcium. J. Strontium. K. Magnesium. L. Lithium. M. Boron. N. Silica. O. Iron. P. Manganese.