Physical geology is a classic that has been used for introductory geology classes for two and a half decades. During that time, it has evolved into a market-leading text read by thousands of students. In keeping with this long-standing tradition, the tenth edition has been updated to include the most current imformation from the various subdisciplines that comprise physical geology. Physical Geology is for both nonscience majors and students contemplating majoring in geology. Although the material covered. We would like to thank the thousands of intructors and students who have helped to make this book a success. Input from users has helped use shape and improve each edition.