| Database dump for this sample: |
| Top depth (cm) | 50.0 |
| Bottom depth (cm) | 54.0 |
| Lithology | Mud with highly rhythmic, but faint submm- to mm-scale laminae defined by colour rather than obvious grainsize variations. Moderate opal (around 10 percent), TOC content (around 0.25 percent), and high water content (around 40-50 percent). Clasts absent. Moderate diatom abundance (0.5 * 10^9 valves/g). |
| Facies interpretation | Rhythmic laminae suggest influence of traction currents reworking hemipelagic suspension settling sediments or turbidites . Rhythmites can also interpreted as meltwater plumes, but thin nature of facies, and lack of obvious size sorting argues against this interpretation, as plumites are often associated with large volume of subglacial meltwater release and high sedimentation rates (Cowan et al., 1999; McKay et al., 2009). Increased opal and TOC consistent with sub ice shelf setting (Hemer and Harris, 2003). The lack of outsized clasts is indicative of depostion beneath an ice shelf lacking basal debris (Domack et al., 1999, Hemer and Harris, 2003; Mckay et al., 2009) |
| Core sample comments | None |
| Carbon type | plantonic foraminifera (N. Pachyderma) |
| Analysis date | None |
| Chem lab | None |
| Analyst | None |
| Sample preparation method | None |
| AMS lab | Rafter Radiocarbon Lab |
| AMS date | None |
| Analysis ID | NZA50805 |
| Percent carbon | None |
| Fraction modern | None |
| δ13C (‰) | None |
| 14C age (yr) | 8726.0 |
| 14C age uncertainty (yr) | 105.0 |
| 14C comments | None |
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| Calibration results: |
| Calibration curve | Marine20 |
| Reservoir correction (14C yr BP) (mean and st.dev. of all Antarctica calibration samples) (http://calib.org/marine/) | 1141 ± 179 |
| Calibration software | IOSACal (v.0.5.3) |
| Calibrated age 95.45 % HPD interval(s) (yr) | 8314.0 to 7460.0 cal yr BP |
| Calibrated age 68.2 % HPD interval(s) (yr) | 8081.0 to 7645.0 cal yr BP |
| 14C calibration plot |  |
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