AcknowledgementsrnPrefacern1. Isotopes and radioactivityrn2. The principles of radioactive datingrn3. Radiometric dating methodsrn4. Dating by cosmogenic isotopesrn5. Uncertainties and results of radiometric datingrn6. Radiogenic isotope geochemistryrn7. Stable isotope geochemistryrn8. Isotope geology and dynamic reservoir analysisrnReferencesrnAppendixrnIndex.