Figure F21. Interstitial water chemistry profiles vs. depth for chlorinity, alkalinity, pH, sodium, sulfate, calcium, magnesium, potassium, strontium, lithium, ammonium, phosphate, silica, manganese, and iron at Holes 1094A (open circles) and 1094D (solid circles). Data are reported in Table T15, p. 67. The horizontal line in the Cl plot indicates the approximate location of the porcellanite layer at 68 mbsf.