Geophysical survey data are used to analyze potential petroleum reservoirs and mineral deposits, locate groundwater, find archaeological relics, determine the thickness of glaciers and soils, and assess sites for environmental remediation. Geophysics covers a broad range of earth science and offers a variety of options. Exploration geophysics is the applied branch of geophysics which uses surface methods to measure the physical properties of the subsurface Earth, along with the anomalies in these properties, in order to detect or infer the presence and position of ore minerals, hydrocarbons, geothermal reservoirs, groundwater reservoirs, and other geological structures. Geophysics has a significant impact on the welfare of society and the planet. Exploration geophysics has helped us to find the energy sources that have driven much of the social and economic advances over the last century. Now those techniques are being used to safeguard our natural environment. While there are many divisions of geophysics such as oceanography, atmospheric physics, climatology, and planetary geophysics, this brochure describes three of the most popular branches of geophysics: Petroleum Geophysics. Environmental Geophysics. Mining Geophysics.