| 137Cs | 40K | 214Pb | 212Pb | Age group (y) |
| 1.0 × 10−8 | 1.3 × 10−8 | 3.1 × 10−10 | 2.0 × 10−8 | 7 - 12 |
| 1.3 × 10−8 | 7.6 × 10−9 | 2.0 × 10−10 | 1.3 × 10−8 | 12 - 17 |
| 1.3 × 10−8 | 6.2 × 10−9 | 1.4 × 10−10 | 6.0 × 10−8 | >17 |