MST physical properties data on magnetic susceptibility, GRAPE, and P-wave velocity were measured at 2- to 4-cm intervals, and discrete measurements of spectral reflectance were made at 2- to 4-cm intervals for Holes 1076A, 1076C, and 1076D. Quantitative and graphic correlation of features present in the physical parameter measurements of adjacent holes were used to establish depth continuity of the stratigraphic sequence. This process was used to determine intercore depth offsets of adjacent holes and to establish a composite depth scale (in mcd) for Site 1076 (Table 8). The stratigraphic sequence was demonstrated to be continuous to 129 mbsf. Cores from Holes 1076A and 1076D, drilled between 129 and 204 mbsf, were largely at equal depths, obfuscating the determination of depth continuity below 129 mbsf.
High gas content in the sediments caused expansion, disturbance, and numerous voids in the recovered cores. These voids generate considerable noise in the MST measurements, particularly in the GRAPE density and magnetic susceptibility data, where the volume reduction caused by voids and cracks reduces the amplitude. P-wave measurements were too noisy to be useful in determining composite depths. Extensive filtering of the measured parameters (GRAPE, magnetic susceptibility, and spectral reflectance) was necessary before constructing a composite section. Filtering procedures are the same as those used at Site 1075 (see "Composite Section" section, "Site 1075" chapter, this volume).
Magnetic susceptibility and color reflectance (red/blue ratio [650 nm/450 nm]) were the primary records used for establishing the depth composite record (Fig. 14). GRAPE density and color reflectance (chromaticity b*) parameters were also used for control and refinement.
Relative correlation of the sedimentary sections was very good; however, stretching and core compression are observed on length scales <9.5 m and lead to locally observed intercore disagreements. Additional processing is required to correct for these distortions. Below 137 mcd, some relative core-to-core adjustments could be made with adjacent Holes 1076A and 1076C. Following construction of the composite depth section for Site 1076, a single spliced record was assembled from the aligned cores (Fig. 15). The Site 1076 spliced record can be used as a sampling guide to recover a single sedimentary sequence. Tie points for these splices are given in Table 9. Correlations below 140 mcd are tentative. Growth of the mcd composite depths relative to the mbsf drilled was ~11% (Fig. 16).