Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
U/He  | |
|---|---|
| RT | absolute age |
| helium | |
| isotope ratios | |
| uranium | |
| SN | Isotopic ratio used in age determination. |
| Data sets | Publications | Expeditions | Thesaurus |
| U/He | |
|---|---|
| RT | absolute age |
| helium | |
| isotope ratios | |
| uranium | |
| SN | Isotopic ratio used in age determination. |