Figure F28. Interstitial lithium (Li+) concentration data from Site 1245 shown with the stratigraphic location of Horizon A and the boundary between lithostratigraphic Units III and IV (see "Lithostratigraphy"). At Horizon A (180 mbsf), there is a localized increase of lithium, which perhaps represents fluid movement through this zone. Maximum concentration of lithium are present at the boundary between lithostratigraphic Units III and IV (420 mbsf), which may represent another fluid conduit.