Table 7.
Statistics of Th data according to geological units.
| GU | Number of harmonized data | Mean concentration (mg/kg) | Number of airborne data | Mean concentration (mg/kg) |
|---|---|---|---|---|
| QLO | 24 | 10.07 | 5155 | 10.05 |
| ALM | 15 | 8.57 | 2470 | 7.82 |
| CLA | 12 | 6.96 | 2507 | 7.71 |
| SAN | 38 | 4.48 | 9146 | 5.16 |
| MES | 12 | 9.69 | 1353 | 9.49 |
| JUR | 6 | 12.84 | 690 | 9.64 |
| CRE | 6 | 6.54 | 570 | 9.32 |
| UCA | 5 | 10.85 | 498 | 10.48 |
| LCA | 3 | 12.15 | 888 | 10.74 |
| UDV | 10 | 10.79 | 2099 | 11.59 |
| MDV | 7 | 10.15 | 483 | 10.89 |
| LDV | 17 | 9.24 | 4444 | 10.24 |
| ORS | 1 | 8.25 | 421 | 11.88 |
| CAM | 1 | 11.54 | 671 | 8.08 |
In italics two major periods of Mesozoic, Jurassic (JUR) and Cretaceous (CRE), are reported.