Preface. 1. Introduction. A. Non-radioactive dating methods. B. Stable isotopes and other indicators of relative age. C. Radioactive isotope age dating. D. Applications of isotope age dating. 2. Radiometric methods. A. Basic procedure. B. Advanced procedures. C. Synthetic tests and results. D. Method comparison. Appendix: Technical development of SIT method for unmixed sediments. 3. Single site studies. A. Lake sediments and 210Pb geochronology. B. Marine sediments and multi-isotope geochronology. C. Creel Bay and Main Bay, Devil's Lake, North Dakota. D. Discussion and conclusions. Appendix: Resolution and uncertainty for disentanglement procedures. 4. Multiple site studies. A. Amazon delta test case. B. 87Sr/86Sr sediment ages in stratigraphy studies. C. Eastern Arabian Sea. 5. Sediment mixing. A. Introduction. B. Basic model. C. Organism-specific models. D. Physical turbation. E. A sediment model with bioturbation. F. Applications and limitations. 6. Biological mixing coefficients. A. Simple linear adsorption. B. Diffusion. C. Microscale diffusion. D. Bulk diffusion. E. Near surficial rapid mixing. F. Partition coefficients effects. 7. Marine contaminant studies. A. Sources of polyaromatic hydrocarbons in the White Sea. B. Burial history of radioactive waste in the Kara Sea. C. Incorporation of uranium mill tailings into North Pond, Colorado. D. Organic carbon preservation in Lake Baikal sediments, Russia. 8. Concerning error estimates in age dating of stage boundaries. A. Introduction. B. Minimum error interpolation. C. Combined absolute and stratigraphic radiometric errors. D. General age/stage interpolations. E. A corollary. 9. Epilogue. References. Subject Index.