Subduction graphic (IMAGE) University of Massachusetts Amherst Caption Schematic diagram showing the geometry of a typical subduction zone and the production of arc volcanoes. New research by X. Yang and H. Gao at UMass Amherst reveals new information on Alaska's arc volcanoes. Credit Xiaotao Yang Usage Restrictions None 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.