Figure 4. Oxygen isotope stratigraphy for Hole 1002C based on measurements of the shallow, mixed-layer dwelling Globigerinoides ruber (, PDB). Data are plotted against sub-bottom depths that have been corrected for voids and gas expansion (see details in text). Standard marine isotope stages (MIS) are shown across the bottom, and the historical Ericson Zones (Z,Y, X, etc.) are shown across the top. Other biostratigraphic datums are described in the text. The stratigraphic distribution of lithologic subunits and visibly laminated intervals is indicated at the top. Diatom-rich subunits include the base of Subunits IA, ID, IF, and the interval of sediment centered at ~118 mbsf. Subunits IB and IG contain distinctive bluish gray to yellowish brown clays.