Figure F2. Bathymetry of the Ontong Java Plateau (IHO/IOC, 1997). Solid circles = previous ODP drill sites that recovered igneous basement; open circles = sites that bottomed in sediment; solid stars = proposed primary drill sites (OJ) for Leg 192; open stars = proposed alternate drill sites. Drilled sites also include ODP site numbers shown in parentheses. Seismic lines used to select the sites = black lines with cruise identifiers (KH = Hakuho Maru, EW = Maurice Ewing, TW = Thomas Washington, Charcot) and numbers in small font size. SB = sonobuoy. Triangles = ocean-bottom seismometer and sonobuoy deployments. The contour interval is 1000 m.