The primary data sets we used were (1) the whole-core magnetic susceptibility, (2) color reflectance component data (lightness, L*, and chromaticity parameters, a* and b*) (Balsam et al., 1997; Blum, 1997; Balsam et al., 1998; Balsam and Damuth, 2000) from split-core working-half sections, and (3) the magnetic intensity from the split-core archive-half sections following alternating field (AF) demagnetization at 20 mT (Sacks, Suyehiro, Acton, et al., 2000). These three data sets were collected during Leg 186 using the multisensor track (MST), the Minolta color scanner, and the long-core cryogenic magnetometer, respectively (Shipboard Scientific Party, 2000a). Core photographs and core descriptions of various intervals (Sacks, Suyehiro, Acton, et al., 2000) provided additional constraints for the correlations, and were used to detect intervals disturbed by drilling. Magnetic susceptibility records provided the highest overall degree of correlation throughout the holes, as well as the highest sampling resolution. The susceptibility values are presented as raw meter values, which can be converted to SI volume susceptibility units by multiplying by ~0.7 x 10-5 (Blum, 1997). The cores were sampled at 2-cm intervals for susceptibility and 5-cm intervals for other data sets. Additionally, magnetic susceptibility or intensity data collected within 5 cm of the end of each section or from intervals that were disturbed by the drilling and recovery process were removed before making correlations for the mcd scale. This includes gaps caused by the removal of 5-cm-long interstitial water (IW) samples, which are taken from the ends of some sections prior to MST and other measurements. This "gap or disturbance" record is recorded in Table T2. The most common disturbed intervals visible from the photographic records were the top 5-70 cm of each core, which frequently contains water-saturated sediments. Other disturbed intervals identified in the data record are gas voids or sediments deformed by "suck-in" or other forms of severe core deformation.
The magnetic susceptibility and magnetic intensity data were converted to natural logarithm format to avoid the preferential correlation of exceptionally large peaks within the data set. Correlations were then made primarily using the log-susceptibility and log-intensity data from each hole. The magnetic intensity data were used to refine the correlations when correlation of the magnetic susceptibility data was ambiguous or difficult. Reflectance data were also compared between holes. In general, the reflectance data were difficult to correlate independently, but marked improvement in correlation was visible when the mcd scale derived using the other data sets was applied to the reflectance data.