Bibliography: p. 379-392.

Surface features of the Earth -- Physical properties of the Earth and its interior -- Geological processes and the geological time scale -- The nature of the crust-mantle boundary and the gabbro-eclogite phase transition -- The composition and mineralogy of the Earth's mantle -- The structure, petrology, and composition of the Earth's crust -- Magma generation -- Geosynclines and the orogenic cycle : classical views -- Tectonic significance of phase transitions -- Continental drift : debate of the century -- Paleomagnetism, polar wandering, and spreading sea floors -- Magnetic anomalies in the ocean basin -- Plate tectonics -- Global geology in the 1970s.