Originally published during the early part of the twentieth century, the Cambridge Manuals of Science and Literature were designed to provide concise introductions to a broad range of topics. They were written by experts for the general reader and combined a comprehensive approach to knowledge with an emphasis on accessibility. This volume contains the 1922 second edition of Grenville A. J. Cole's Rocks and Their Origins, first published in 1912. Intended for non-specialists, the book offers six concise chapters on various rock types, their characteristics, and their formation.