Originally published in 1963, this classic textbook was revised fully for the 1972 edition. The author presents a comprehensive account of all topics falling within the domain of structural geology in his characteristically objective, scientific and logical manner. The book pays particular attention to definitions and the origin of terms. Geology is a global science and this book used examples and ideas from work in many countries. The book is comprehensive in scope, dealing not only with secondary structures and tectonics, but also with primary structures of secondary and igneous rocks. This was the first textbook to deal with rock material as two-phase systems rather than as solids and this approach is continued in this reissued edition by analysis of concepts such as ocean-floor spreading and plate tectonics