Extended Data Table 2. Chronology of the upper 6 cm of core PS69/251 based on constant rate of supply modelling of the unsupported lead-210 concentration.
Errors for ages and mass accumulation rates are given as 1 s.d.
| Depth (cm) | Age (yrs) | Age error (yrs) | Date (yrs A.D.) | Mass accumulation rate (kg m-2 yr-1) | Mass accumulation rate error (kg m-2 yr-1) |
|---|---|---|---|---|---|
| 0 | 2006 | ||||
| 0-1 | 6 | 3 | 2000 | 0.78 | 0.10 |
| 1-2 | 21 | 4 | 1985 | 0.57 | 0.10 |
| 2-3 | 40 | 6 | 1966 | 0.41 | 0.10 |
| 3-4 | 59 | 9 | 1947 | 0.42 | 0.16 |
| 4-5 | 81 | 15 | 1925 | 0.38 | 0.19 |
| 5-6 | 118 | 37 | 1888 | 0.24 | 0.28 |