Highly acclaimed as an outstanding text, the fifth edition provides comprehensive, up-to-date coverage of both the classical and modern concepts of physical geology, providing an ideal introduction to the subject. As in previous editions of Putnam's Geology, the editors have retained Putnam's distinctive and accessible style and superb photographs. For the new edition, the authors have reorganized the text. Beginning with introductory chapters on general features, it proceeds to chapters on internally generated processes, externally generated processes, and concludes with a timely discussion of mineral and energy resources, including current trends in their use. Distinctive in its visual appeal, the book makes exceptional use of some 346 unusually fine photographs, many by noted photographers, as well as some of the best work from the U.S. Geological Survey collection, all supplemented by 270 two-color line drawings to clearly illustrate the principles of geology.