The upper Miocene-Pleistocene sections at Sites 907 and 985 have provided the most complete magnetostratigraphic records available from the Norwegian-Greenland Sea. Although the sections are not affected by unconformities to the same extent as the Leg 104 (Vøring Plateau) sites, the interpretation of the magnetic stratigraphies is not unequivocal. Siliceous microfossils are reasonably well preserved at Site 907; however, the lack of cosmopolitan biostratigraphic markers indicates that the magnetostratigraphic interpretations cannot be easily ratified by biomagnetostratigraphic correlations from outside the area.
We use silicoflagellate datums at Site 907 to "pin" the magnetostratigraphic interpretations. Silicoflagellate datums at Site 982 (North Atlantic) and DSDP Leg 408 can be tied to nannofossil zones, which in turn can be tied to the polarity time scale. The resulting magnetostratigraphic interpretation at Site 907 implies a hiatus at ~105-110 mbsf where deposition was halted or very slow for ~2.7 m.y. in the 7.2-9.9 Ma interval. Apart from this unconformity, sedimentation rates were fairly constant at Site 907 with an increase in sedimentation rate at ~12 Ma. At Site 985, the magnetostratigraphic record does not extend beyond ~6 Ma. Sedimentation rates appear to have been fairly constant since that time.