Glass shard major oxide data for the ~25.3 ka Ōruanui supereruption in WDC06A, EDML, and DF2 ice cores (Antarctica)

This dataset contains major oxide compositions of glass shards from four Antarctic ice cores: WDC06A (West Antarctica), EDML (Dronning Maud Land), DF2 (East Antarctica), and Skytrain (Skytrain Ice Rise, West Antarctica). The ice cores were recovered during their respective field campaigns and analysed for volcanic glass shards derived from the Ōruanui supereruption between October 2023 and September 2025. The dataset reports unnormalised weight percentages of SiO₂, TiO₂, Al₂O₃, FeO, MnO, MgO, CaO, Na₂O, K₂O, and Cl analysed by EPMA-WDS at Victoria University of Wellington and the University of St Andrews, together with analytical totals for each glass shard. These datasets were used for geochemical comparison with other glass analyses, confirming the Ōruanui geochemical fingerprint in WDC06A, EDML, and DF2. In Skytrain, glass associated with Antarctic volcano Mount Berlin was detected