(Table 1) Polarity boundaries observed in ODP Leg 127/128 sites

We present the magnetostratigraphic data for Sites 794, 795, 797, 798, and 799 in the Japan Sea. APC cores from these sites record the polarity sequence for the Pliocene-Pleistocene period. The intensity of the magnetization decreases with depth by more than an order of magnitude, and the low intensity samples tend to give scattered directional data. The cause of these phenomena is examined based on the correlation of the intensity with the bulk magnetic susceptibility.