CONTENTS:- 1. Introduction. 2. Equilibrium and Non-equilibrium Reactions in Metamorphic Processes. 3. Chemistry of Weathering Processes. 4. Earth's History. 5. Applications of Palaeontologic Data in Palaeoecology. 6. Morphology and Environment. 7. Basic Ideas about Micropalaeontology and Microfossils. 8. Stratigraphic Classification and Correlation.