Figure F53. Concentration profiles of dissolved Na⁺, K⁺, and Li⁺ at Site 1149. Open circles = Hole 1149A; solid circles = Hole 1149B. Lithostratigraphic units and subunits are as defined in "Lithostratigraphy" in "Sedimentology". Shaded regions indicate the position of the suggested clay alteration zone of Subunits IIA and IIB. Arrows indicate average concentrations in seawater (Millero and Sohn, 1992).