Paleoclimatology is the field of study that aims to analyze the climate of the geologic past and climatic variability on earth. Some of the significant topics covered in this book are geological time scale, biogeochemistry, oceanography, remote sensing and measurement techniques to understand the climate of past, etc. The researches and case studies encompassed in this book are aimed at understanding past climate and climate changes in context of present and future climatic variability. This book will help new researchers by foregrounding their knowledge in this field.