CONCLUSIONS

The discrete sample analyses result in the following major conclusions:

1. Directional data obtained from the discrete samples do not, in most cases, provide a significant improvement over the pass-through data. However, in some cases these new data were able to resolve ambiguities in the magnetostratigraphic record.
2. Significantly, the C24r/C24n reversal boundary was identified at Sites 1262 and 1267, and most boundaries in the Paleocene and Upper Cretaceous sections are now identified to within 10–30 cm.
3. Magnetic mineralogy results show that prior to the late Miocene, the predominant detrital magnetic component was coarse-grained magnetite and that after the late Miocene titanomagnetite has also been present. This suggests a possible change in detrital source at that time.