Figure 2. The high-resolution MCS coverage (collected aboard R/V Oceanus in 1995; Oc270) was used to select all sites except MAT-13A, which is located on a Ew90-09 MCS line (see Fig. 1). Swath backscatter/bathymetry data coverage shown was acquired in the Spring of 1996 (Goff et al., 1996); subsequent acquisition (November 1996) is not shown, but now includes the secondary upper slope sites from which Site 1073 was chosen.
Figure 3. Interpreted version of part of Oc270 Profile 885, a dip MCS profile that runs through Site 1071 and within ~150 m of Site 1072. The approximate total depths (TDs) penetrated in Holes 1071A-1071E, 1071F-1071G and Holes 1072A-1072B are indicated (vertical white bars), as are the locations of prominent stratigraphic discontinuities/sequence boundaries (dashed lines), which were identified by tying previously interpreted regional Ew90-09 profiles to the higher resolution Oc270 profiles (Christie-Blick et al., 1992; Mountain et al., 1996; Austin et al., 1996). The "s" designation following the "pp" (provisionally Pliocene-Pleistocene) and "m" (provisionally Miocene) sequence boundary identifications are meant to distinguish the shelf sequence boundaries, targeted for sampling and logging by Leg 174A, from similarly labeled surfaces calibrated on the slope by Leg 150 (Mountain, Miller, Blum, et al., 1994).
Figure 4. Generalized summary for Holes 1071A-1071C and 1071F showing core recovery, lithology, age, lithologic units, and subunits. The column shows the lithology based on recovered cores (data) and inferred for intervals of nonrecovery based on the gamma-ray signature from the first 90 mbsf and a wireline log from the nearby COST-B2 well. B/M = Brunhes/Matuyama boundary.
Figure 5. Age-depth plot, showing the age ranges interpreted from microfossil assemblages at Site 1071. Stratigraphic discontinuities pp3(s), pp4(s), pp5(s), m0.5(s), and m1(s) are also illustrated. Ages quoted in Figure 3 reflect input from this site and from Site 1072.
Figure 6. Interstitial-water Cl- profiles for Sites 1071 and 1072. Arrow = approximate location of standard seawater Cl- concentration.
Figure 7. Generalized summary for Hole 1072A showing core recovery, lithology, age, lithologic units and subunits. The columns show the lithology based on recovered cores and inferred lithology for intervals of nonrecovery based on the gamma-ray signature from wireline logs. B/M = Brunhes/Matuyama boundary.
Figure 8. Age-depth plot, showing the age ranges interpreted from microfossil assemblages at Site 1072. Stratigraphic discontinuities pp3(s), pp4(s), and pp5(s) are also illustrated.
Figure 9. Interpreted version of part of Oc270 Profile 32, an approximate strike section running through Site 1073. The approximate TD penetrated in Hole 1073A is indicated (vertical white bar); the approximate depths in mbsf shown on this time section are derived from a velocity function developed from Leg 150 Site 903. The possible locations of prominent stratigraphic discontinuities/sequence boundaries identified on the outer shelf are shown. The "s" designation following the "pp" (provisionally Pliocene-Pleistocene) and "m" (provisionally Miocene) sequence boundary identifications are meant to distinguish the shelf sequence boundaries targeted for sampling and logging by Leg 174A from similarly labeled surfaces calibrated on the slope by Leg 150 (Mountain, Miller, Blum, et al., 1994).
Figure 10. Generalized summary for Hole 1073A showing core recovery, lithology, age, lithologic units and subunits.
Figure 11. Selected concentration depth profiles of interstitial water at Site 1073 with approximate lithostratigraphic boundaries.