Introduction: Evolution is a process where change occurs in the living things over the time period and is successfully inherited and passed to future generations.
Even though the earth is considered as static, it is actually a continuously changing planet. The geological changes are caused mainly due to certain forces. Geological time scale is the total life span on the earth from its origin. It is also called as the calendar of the earth, as they explain the relationships and timing of events that have taken place during the Earth's history.