Figure F20. Combined biostratigraphic interpretation of the Eocene-Oligocene transition at Site 1171. The events are placed at mean depth of event occurrence. Data from Hole 1171C and 1171D have been used and listed by their mean composite depth (mcd). N = nannofossil, F = planktonic foraminifer, sm = small, R = radiolarian, D = diatom, and C = dinocyst. TD = total depth.