Mick, E., Avard, G. and Stix, J. 2026. The origin of fresh glass in phreatic eruptions at Rincón de la Vieja and Turrialba volcanoes, Costa Rica: Secondary hydration within hydrothermal systems. Volcanica. 9, 1 (May 2026), 417–433. DOI:https://doi.org/10.30909/vol/jysr2288.