"The fifth edition of the Glossary of Geology contains nearly 40,000 entries, including 3,600 new terms and nearly 13,000 entries with revised definitions from the previous edition. Additions and changes reflecting both advances in scientific thought and changes in usage make this 800+ page hardbound reference tool indispensable to professional earth scientists and students. In addition to definitions, many entries include background information and aids to syllabication. The Glossary draws its authority from the expertise of the more than 100 geoscientists in many specialties who reviewed definitions and added new terms." --AGI.