The Solid Earth is a general introduction to the study of the physics of the solid Earth, including the workings of both the Earth's surface and its deep interior. The emphasis throughout is on basic physical principles rather than instrumentation or data handling. The second edition of this acclaimed textbook has been revised to bring the content fully up-to-date and to reflect the most recent advances in geophysical research. It is designed for undergraduates on introductory geophysics courses who have a general background in the physical sciences, including introductory calculus. It can also be used as a reference book for graduate students and other researchers in geology and geophysics. Each chapter ends with exercises of various degrees of complexity, for which solutions are available to instructors from solutions@cambridge.org. The book contains an extensive glossary of geological and physical terms, as well as appendices that develop more advanced mathematical topics.