Figure F3. Meridional cross-section of southeastern Pacific (Shipboard Scientific Party, 2003) showing water masses based on dissolved oxygen concentrations (Levitus et al., 1993). Site 1237 at 3212 meters water depth is shown in relation to Pacific Central Water (PCW), Circumpolar Deep Water (CPDW), Antarctic Intermediate Water (AAIW), and Gunther Undercurrent (GU). During the late Oligocene, Site 1237 was probably at a shallower water depth and in the mixing zone between PCW and CPDW.

Figure F3. Meridional cross-section of southeastern Pacific (Shipboard Scientific Party, 2003) showing water masses based on dissolved oxygen concentrations (Levitus et al., 1993). Site 1237 at 3212 meters water depth is shown in relation to Pacific Central Water (PCW), Circumpolar Deep Water (CPDW), Antarctic Intermediate Water (AAIW), and Gunther Undercurrent (GU). During the late Oligocene, Site 1237 was probably at a shallower water depth and in the mixing zone between PCW and CPDW.