Figure F25. Profiles of chemical constituents in interstitial waters. Error bars (1 relative standard deviation percentage) are plotted where they are larger than the plot symbols. A. Alkalinity. B. Chloride. C. Sodium. D. Potassium. E. Calcium. F. Magnesium. G. Strontium. H. Lithium. I. Boron. J. Barium. K. Sulfate. L. Manganese. M. Iron. N. Silicon.