Figure F54. Concentration profiles of dissolved Ca²⁺ and Mg²⁺ at Site 1149. Open circles = Hole 1149A; solid circles = Hole 1149B. Lithostratigraphic units and subunits are as defined in "Lithostratigraphy" in "Sedimentology". Arrows indicate average concentrations in seawater (Millero and Sohn, 1992).