Figure F27. Composite digital photographs of the Eocene/Oligocene (E/O) boundary from Leg 199 using biostratigraphic (nannofossil and radiolarian) and magnetostratigraphic data. Orange dashed line = preliminary position of the boundary (at the 33.7-Ma isochron) as estimated through linear interpolation between paleomagnetic and/or biostratigraphic indications (see Table T2, ). Note that linear interpolations are subject to significant error associated with the change in sedimentation rate that takes place across this transition (see Fig. F25, ). Calc. = calcareous. Paleomag = paleomagnetism.

Figure F27. Composite digital photographs of the Eocene/Oligocene (E/O) boundary from Leg 199 using biostratigraphic (nannofossil and radiolarian) and magnetostratigraphic data. Orange dashed line = preliminary position of the boundary (at the 33.7-Ma isochron) as estimated through linear interpolation between paleomagnetic and/or biostratigraphic indications (see Table T2). Note that linear interpolations are subject to significant error associated with the change in sedimentation rate that takes place across this transition (see Fig. F25). Calc. = calcareous. Paleomag = paleomagnetism.