Geochronology is the field of science concerned with determining the ages of rocks and other stuff. In this book we attempt to outline the basic principles used for the quantification of geological time focusing on the radio-isotopic dating techniques. We are attempting to be inclusive about the methodologies and applications however there is a focus on the mainstream chronometers and the application of these to the quantification of geologic time.

## Part One - Introduction

## Part Two - Principles of Radioisotopic Dating

## Part Three - Rocks to Ratios: Sample selection and Characterization

## Part Four - Rocks to Ratios: Analytical Approaches

- Introduction: Extracting Quantitative Isotope data From Minerals and Rocks
- Isotope dilution
- Microbeam methods
- Principles of mass spectrometry
- Thermal-ionization mass spectrometry
- Inductively-coupled plasma mass spectrometry
- Secondary ion mass spectrometry
- Gas-source mass spectrometry
- Sample introduction by laser ablation

## Part Five - Ratios to Dates: Determining P/D and Decay Constants

## Part Six - Dates to Ages: Considering Interpretation and Uncertainties in Geochronology

## Part Seven - Commonly Used Decay Schemes

## Part Eight - Examples of Application

- Introduction
- Age of the Earth
- Tectonic Applications
- Stratigraphic Applications
- Thermochronology
- Quaternary Geochronology