Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. analysis and testing techniques
6. measuring
7. dating (measuring process)
8. radioactive dating
9. uranium-series dating

Anotations

Scope note:

Radiometric dating method which measures the age of igneous calcium carbonate materials. The technique calculates the degree to which radioactive thorium-230 isotopes within a sample have reestablished secular equilibrium with their parent uranium-234 isotopes.