Longman illustrated dictionary of geology : the principles of geology explained and illustrated

All the basic principles of geology are explained in this fully illustrated dictionary in which words are grouped by topic, and which has useful appendices and easy-to-use index. The clear definitions and the colourful illustrations cover all aspects of theoretical and practical geology, including types of ores and how to classify them, types of strata, faults, valleys and streams, the structure of the earth and crystallography.