SPE 459 (IMAGE) Geological Society of America Caption GSA's new Special Paper 459, Hydrothermal Processes above the Yellowstone Magma Chamber: Large Hydrothermal Systems and Large Hydrothermal Explosions, by Lisa A. Morgan, W.C. Pat Shanks III and Kenneth L. Pierce, uses new mapping, sampling, and analysis techniques to document a broad spectrum of ages and geologic settings for these events. Credit The Geological Society of America Usage Restrictions non-commercial/educational only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.