For lab courses in Physical Geology. A top-seller for over 35 years with over one million copies sold, this lab manual represents by far the best collection of photos of rocks and minerals-and one of the best compilations of exercises-available. With exercises using maps, aerial photos, satellite imagery, and other materials, this classic manual encompasses all the major geologic processes as well as the identification of rocks and minerals. All changes in the Twelfth Edition are based on reviewer feedback.