Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years. Mountains have been built and eroded, continents and oceans have moved ...

Read the chapter in this order: Radioactivity, First Dating of Minerals, Concept of Decay (p. 92-94), Modern Isotopic Dating (p. 94-98), Absolute Measures of Time (p. 91) Modern Relative Time Scale (p ...