Table 1 Sample information, raw radiocarbon measurements (uncalibrated, corrected for isotope fractionation; years BP) and errors (quoted as one standard deviation, reflecting statistical and experimental errors), and summarized calibrated and modelled results for the seven single-year radiocarbon samples obtained from the trough
Approximate ring # | UGAMS | δ13C ‰ | 14C age years BP | Modelled age, cal AD | % probability | Agreement index |
|---|---|---|---|---|---|---|
0 | 57336 | – 26.6 | 296 ± 22 | 1525–1598 1615–1655 | 46.4 49.4 | 90 |
180 | 57337 | – 28.6 | 201 ± 24 | 1733–1757 | 95.4 | 96.3 |
190 | 57338 | – 26.7 | 137 ± 23 | 1742–1765 | 95.4 | 72.7 |
200 | 57339 | – 24.3 | 191 ± 22 | 1749–1775 | 95.4 | 119.7 |
210 | 57340 | – 25.0 | 151 ± 21 | 1759–1785 | 95.4 | 68.5 |
220 | 57341 | – 23.9 | 225 ± 23 | 1769–1795 | 95.4 | 124.4 |
227 | 57342 | – 24.8 | 215 ± 42 | 1778–1804 | 95.4 | 151.3 |