Geology is the scientific study of rocks that form the solid Earth and the changes which they undergo over time. It is a sub-discipline of Earth science. It is undergoing rapid development owing to the technological growth witnessed in the last decade. Geologists aim to study dynamics of earth's crust and understand phenomena like the evolution of earth, tectonic shifts, etc. The concepts of geology have applications in the fields of mining, engineering, hydrology, etc. This book is compiled to provide a general overview of the subject. It strives to provide a fair idea about this discipline and to help develop a better understanding of the latest advances within this field. It will serve as a valuable source of reference for graduate and post graduate students. Researchers, experts and all associated with the field of geology will benefit alike from this book.