Samples were stepwise AF demagnetized and the results are shown in Zijderveld plots in Figure 1 and Figure 2. These results indicate that secondary components were removed by 30.0-40.0 mT. The paleomagnetic results after AF demagnetization at 40.0-70.0 mT from the K/T boundary interval of Hole 1001A are shown in Figure 2. Two polarity transitions interpreted in Figure 3 as the C29N onset and the C30N termination are shown. Sedimentation rates above and below the K/T boundary are shown in Table 1.
The results from paleomagnetic and rock-magnetic studies of Hole 1002C samples are shown in Figure 4 and Figure 5, respectively. The inclination record indicates that AF demagnetization removes the drilling overprint and that the entire section is Brunhes (Chron 1N) in age. The rock-magnetic record shown in Figure 5 shows interesting recurring features at ~10 mbsf, ~50 mbsf, ~120 mbsf, and ~155 mbsf. These recurring features are characterized by changes indicative of rapid magnetic grain-size changes and increases in the high coercivity (hematite/goethite) magnetic component.