Ocean circulation in the deep Pacific Ocean from the Early Pleistocene. Shading shows modelled salinity of the Pre-Industrial Pacific Ocean 7 . Palaeogeography based on Pliocene map of ref. 61 . Pleistocene geography based on modern coastlines and topography 62 with sea levels 60 m below modern. Elevation above 1000 m is shown in brown. Location of ODP Sites 1209 (orange) and 1208 (blue) are shown as circles.
