Figure F13. Pore water composition vs. depth curves for Holes 1200D, 1200E, and 1200F. A. pH. B. Alkalinity. C. Sodium/chloride. D. Boron. E. Sulfate. Hole 1200E is closest to the vent community on the summit of South Chamorro Seamount; Hole 1200D is the most distant. Arrow = seawater value.