TY - RPRT TI - Opal-A in glassy pumice, acid alteration, and the 1817 phreatomagmatic eruption at Kawah Ijen (Java), Indonesia AU - Jacob B. Lowenstern AU - Vincent van Hinsberg AU - Kim Berlo AU - Moritz Liesegang AU - Kayla D. Iacovino AU - Ilya N. Bindeman AU - Heather M. Wright PY - 2018 DO - 10.3389/feart.2018.00011 UR - https://pubs.usgs.gov/publication/70195417 ID - 70195417 ER -