As important to modern world views as any work of Darwin, Marx, or Freud, Principles of Geology is a landmark in the history of science. In this first of three volumes, Charles Lyell (1797-1875) sets forth his powerful uniformitarian argument: processes now visibly acting in the natural world are essentially the same as those that have acted throughout the history of the earth, and are sufficient to account for all geological phenomena.

Martin J. S. Rudwick's new Introduction, summarizing the origins of the Principles, guides the reader through the structure of the entire three-volume first edition and considers the legacy of Lyell's great work.

As important to modern world views as any work of Darwin, Marx, or Freud, Lyell's Principles of Geology has never before been available in paperback. In the second of three volumes, Lyell (1797-1875) continues his uniformitarian argument of Volume I—the physical features of the earth are endlessly fluctuating around a stable mean—but focuses on organic rather than inorganic processes. Volume II is widely known because of its influence on Darwin, who took the book on his famous Beagle voyage and was stimulated by Lyell's extensive treatment of biological history and diversity.

As important to modern world views as any work of Darwin, Marx, or Freud, Lyell's Principles of Geology has never before been available in paperback. In this third and final volume, Charles Lyell (1797-1875) devotes much attention to the "syntax of geology," that is, to a way of reconstructing the geological past on the basis of the "grammar" of the present processes he has described in the earlier volumes. He defines four periods of the Tertiary—Newer Pliocene, Older Pliocene, Miocene, and Eocene—and argues that the deposits dating from each period demonstrate the uniformity of processes and environments throughout the Tertiary, and indeed in earlier periods of earth history.

Martin J. S. Rudwick has compiled a bibliography giving full references for the sources Lyell cites in all three volumes of the Principles.