CONCLUSIONS
The discrete sample analyses result in the following major conclusions:
- 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.
- 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.
- 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.
