Geophysics and Geology are concerned with the study of the Earth. Geophysics is the study of the Earth's internal structure and dynamics through the use of physics and mathematics. Geology is the study of the Earth. It includes composition and material, structure, processes, and history. Geology is the study of the solid Earth and involves both qualitative and quantitative descriptions of the solid Earth. Geologist use the methods of applied geophysics to try and measure remotely parts of the Earth that are not available to direct investigation. The study of geology and geophysics intersect in for example in the study of the composition of the deep interior of the Earth and the driving mechanism behind plate tectonics. Geophysics is the study of the Earth by quantitative physical methods. It is an applied science and incluudes the Earth's interior, crust, oceans, atmosphere and magnetosphere. Applications are broad and m include magnetic studies related to the Earth's interaction with the Sun; plate tectonics and tie interior of the Earth; petroleum and mineral exploration; environmental and engineering analyses; and even archaeological investigations. Special areas of study include the following, among others. Geophysicists use physics to study rocks indirectly. Most often this involves imaging the Earth to build a map or picture of what is happening underground. Geophysicists use a variety of methods such as seismic imaging, electromagnetic methods, gravity methods, etc. It is one of the indispensable books for the library of every working geologist and every one who wishes to be an up-to-date teacher of geology and geophysics.