Figure 8. Contour map of the oxygen isotopic composition of the pore waters shown in meters below seafloor, Sites 1003-1007. Sites 1005 is located on the right side of the figure and is closest to the platform margin, whereas Site 1006 is located 25 km from the margin. The heavy ¹⁸O values close to the platform reflect the increasing amount of carbonate diagenesis taking place in this region.