This revised popular field guide describes in detail each of the more than three hundred geysers in Yellowstone National Park. With updated data, The Geysers of Yellowstone is designed as both a reference work and a fine introduction to the nature of geyser activity for the newcomer to geothermal phenomena. A glossary of key terms is provided, and a comprehensive appendix discusses other geyser areas of the world. Detailed maps accompany each geyser basin described, and tables are provided for easy reference.