Archive halves of all cores recovered from Sites 1098 and 1099 were measured at 5-cm intervals (Tables T5, T6, T7, T8, T9, T10, T11 , T12, T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, all also in ASCII format in the TABLES directory). Alternating field (AF) demagnetization of the natural remanent magnetization (NRM) was performed at 10 and 20 mT. The low peak demagnetization level was chosen to preserve the remanence for future U-channel studies. Holes 1098A, 1098B, and 1098C have similar inclination profiles (Fig. F16). Inclinations at both sites are steeply negative, except within lithologies that have been interpreted as turbidites and diamicts (see "Lithostratigraphy"). The intensity of remanence is generally correlated with magnetic susceptibility (Fig. F17), which indicates that the intensity is partly dependent upon the composition and concentration of the magnetic mineral assemblage.

Discrete samples were collected from the working half of Hole 1098C. There is good agreement between the discrete samples and split-core measurements (Fig. F18). The steeply inclined drill-string overprint was removed at the 10-mT demagnetization step, and the characteristic remanent magnetization direction of most samples was stable up to the 50-mT demagnetization step (Fig. F19; Table T25, also in ASCII format in the TABLES directory). Of the 25 samples measured, 20 had a maximum angular deviation angle <5º, and the remaining samples had maximum angular deviation angles <11º (Table T26, also in ASCII format in the TABLES directory). Samples that had a weak intensity of remanence and low susceptibility generally had a higher maximum angular deviation angle (Fig. F20).

The 50- and 107-m sedimentary sections recovered at Basins I (Site 1098) and III (Site 1099), respectively, are assumed to be Holocene in age, on the basis of radiocarbon dates and sedimentation rates published by Leventer et al. (1996). The intensity of remanence was normalized by magnetic susceptibility to examine the relative paleointensity of the geomagnetic field and thus derive an approximate chronology by correlation with the well-dated Holocene geomagnetic paleointensity record for the Northern Hemisphere. Normalization at this site was complicated by the long interval of extremely low susceptibility occurring between ~8 and 24 mbsf in both Basins I and III, and by the high susceptibility values within turbidites. Although normalization using susceptibility yields similar profiles in Holes 1098A, 1098B, and 1098C (Fig. F21), the resulting normalized intensity record cannot, at this time, be confidently matched with the Northern Hemisphere record. More work is planned to investigate the magnetic mineralogy and alternate methods of relative paleointensity normalization.