Essentials Geology Book Block Author:Frederick K. Lutgens, Edward J. Tarbuck Developed for one-semester general education courses, the Prentice Hall Learning System Edition of Essentials of Geology-a series of lower cost, shorter texts with closely connected web applications-provides an alternative to traditional texts. Flexible, streamlined, and efficient, each element in the System Edition is designed to maximize the a... more »dvantages of its medium and correlate to students' course activity.« less