The word Geology is derived from the Greek words ‘geo’ which means the earth and “logos” which means knowledge. This knowledge regarding the earth explains its origin, contents as well as the history of its evolution. From a field that is descriptive and philosophical, geology combines knowledge from mathematics, chemistry, physics and biology to achieve its main dynamic function that is the exploration of earth resources (groundwater, metallic minerals, petroleum, natural gas, radioactive minerals and construction materials) that are required for the development of human civilisation. Today modern geology is better known as geosciences and has expanded its scope from economic geology and petroleum geology to engineering geology. Geologists currently work together with civil and geotechnical engineers in providing geological information for the construction of large infrastructure such as dams, bridges, sky scraper and airports that are safe and cost effective. In environmental geology, the geologists are investigating geo-disasters such as landslides, mudflows, earthquakes, tsunami, volcanoes and the like in order to reduce damage and construct warning systems.