The branch of earth science which deals with the structure of the rocks and solid Earth along with the processes is known as geology. It involves the study of rock as it provides primary records of geologic history. There are various sub disciplines of geology, namely, biogeology, structural geology, stratigraphy, petrology, hydrogeology etc. A number of field, numerical and laboratory modeling methods are used to understand diverse processes related to Earth. Geological mapping is the use of geologic maps which are made to understand varied geological features. It comprises of structural mapping, surficial mapping and stratigraphic mapping. Varied dating methods are applied to provide information of geologic history and its timeline. This book provides comprehensive insights into the field of geology. Most of the topics introduced herein cover new techniques and the applications of this field. It will provide comprehensive knowledge to the readers.