GRAPE density, magnetic susceptibility, and natural gamma radiation were measured near continuously with the MST on whole-round sections of cores from each hole (see "Explanatory Notes" chapter, this volume). Results from compressional (P-wave) ultrasonic velocity measurements with the MST were disregarded because of very high noise level.
Index properties (gravimetric density, porosity, and moisture content) were measured on one or two samples (volume = ~10 cm3) per working-half section on all cores from Hole 1079A, using Method C (see "Explanatory Notes" chapter, this volume).
Ultrasonic compressional (P-wave) velocities and undrained vane-shear measurements were conducted at a resolution of one or two samples per section near the index properties samples. The modified Hamilton Frame was used for the discrete P-wave measurements.
The sampling interval for GRAPE density (Fig. 25A, Fig. 25B, Fig. 25C) and magnetic susceptibility measurements (Fig. 26A) was 2 cm for the upper 60 (mbsf and 4 cm below 60 mbsf. MST data are included on CD-ROM (back pocket, this volume). Natural gamma radiation was measured with a sampling period of 30 s at 32-cm resolution (Fig. 26B). Magnetic susceptibility and natural gamma radiation show some similarities in their profiles (Fig. 26A and Fig. 26B, respectively), but seem to reveal a phase difference. GRAPE density matches well with the discrete wet bulk density data (Fig. 25).
The near-continuous velocity profile recorded with the MST was disregarded because of instrumental problems and high scatter caused by degassing and voids. Discrete velocities range between 1510 and 1655 m/s (Fig. 27) with an increase around 5 mbsf and a steep increase at 28 mbsf. The same characteristics are observed in the density measurements (see below) and may be related to higher carbonate content in the silty clay-rich sediments (see "Lithostratigraphy" and "Inorganic Geochemistry" sections, this chapter). High-quality discrete ultrasonic signals were recorded between 0 and 52 mbsf and show an abrupt, complete attenuation below 52 mbsf.
Results of discrete measurements of wet bulk density, porosity, and moisture content are presented in Fig. 28A, Fig. 28B, Fig. 28C, respectively (also see Table 12 on CD-ROM, back pocket, this volume). The density values vary between 1300 and 1960 kg/m3, and show higher values in intervals of higher carbonate content (see "Lithostratigraphy" section, this chapter). A varying proportion of abundant clay minerals and bigger grain sizes may be indicated by the porosity profiles, which shows a decrease from 85% in the top section to values as low as 49% at 120 mbsf. Discrete density values are lower than GRAPE values between 0 and 52 mbsf (Fig. 25A) and are higher below that depth (Fig. 25B, Fig. 25C). The shape of both profiles is very similar, revealing good coherence between the two measurements. A good correlation between the velocity and wet bulk density profiles can be observed between 0 and 52 mbsf.
The thermal conductivity profile at Hole 1079A was measured by inserting a single probe into every second core section (see "Explanatory Notes" chapter, this volume). The values show significant scatter over the entire depth range, with an overall tendency to lower values below 40 mbsf (Fig. 26C).
An undrained vane-shear measurement was performed in the bottom part of each core section. The profile shows a gradual increase of shear-strength values from the top to 110 mbsf (Fig. 26D). The observed shape of vane-shear curves within each core may be related to the differential pressure within the core liners and variable sediment distortion. Consequently, lower shear-strength values were often measured close to the top and bottom of each core. The downhole trend among maximum values in each core correlates well with the wet bulk density measurements and reflects increasing compaction.