The Key to Earth History An Introduction to Stratigraphy Peter Doyle Matthew R. Bennett and Alistair N. Baxter School of Earth Sciences, University of Greenwich, UK The Key to Earth History is the first textbook on stratigraphy to introduce the student to the basic tools used by geologists to reconstruct Earth's history, as well as showing how these can be utilised to chart the pattern of global environmental change which has taken place since the...