The field of physical geology continues to evolve with new tools, new ideas new approaches. Working closely with Frank Press and Ray Siever, the new co-authors of the fourth edition, John Grotzinger and Tom Jordan, have introduced a wealth of more recent data and applications to keep the science in the text on the cutting edge. This introductory physical geology textbook aims to help students understand what physical geology teaches us about the world and what it brings to our lives. It is designed to bring the worldview of the working geologist to an audience not only new to this specific field, but in many cases to science in general. Students aren't merely presented with concepts and processes - they come to learn how we know what we know and how that knowledge impacts their lives as citizens and consumers. A student website and an instructor's website are available, and supplements are available in the form of: a study guide (0-7167-5776-1); lecture notebook (0-7167-5778-8); instructor's resource manual (0-7167-5781-8); instructor's resource CD with PowerPoint presentations (0-7167-5782-6); slide set with lecture notes (0-7167-5779-6); overhead transparency set (0-7167-5780-x); and test bank with 1200 multiple-choice questions on CD-ROM (0-7167-5783-4) and in a printed version (0-7167-5784-2).