Vesicularity (phi) as a function of time for samples of natural hydrated silicate glass (obsidian) from optical dilatrometric analysis. Also numerical model for analysis of dataset and associated user guide.

A compilation of mineral and glass compositions erupted at Villarrica volcano, Chile, measured by electron microprobe. Data are sourced from published articles, theses and unpublished works. Minerals and glasses are from deposits erupted over the last 100ka. This is supporting data for the manuscript entitled 'Insights into Magma Storage Beneath a Frequently Erupting Arc Volcano (Villarrica, Chile) from Unsupervised Machine Learning Analysis of Mineral Compositions' by F. O. Boschetty, D. J. Ferguson, J. A Cortés, E. Morgado, S. K. Ebmeier, D. J. Morgan, J. E. Romero and C. Silva Parejas.

120 samples of 57 tephra layers identified at IODP Expedition 350 sites (U1436 and U1437) were used in grain size analysis. Some layers have one grain size measurement, others have multiple measurements throughout the tephra layer.

Halogen (Cl, Br, I) contents measured in (a) basalt glass chips collected from subglacial eruptions in Iceland's neovolcanic zones, and (b) basalt glass chips recovered from the Reykjanes Ridge.

Petrological and geochemical analysis of tephra samples from Aluto volcano, Ethiopia. Data are referenced in McNamara et al., 2018: Using Lake Sediment Cores to Improve Records of Volcanism at Aluto Volcano in the Main Ethiopian Rift; https://doi.org/10.1029/2018GC007686.

Geochemical analyses of melt inclusions, host minerals, and glasses from the 2014-15 Holuhraun eruption, Iceland. Published in: Hartley ME, Bali E, Neave DA, Maclennan J, Halldorsson SA (2018) Melt inclusion constraints on petrogenesis of the 2014–2015 Holuhraun eruption, Iceland. Contrib Mineral Petrol 173:10. doi:10.1007/s00410-017-1435-0

Geochemical analysis of volcanic samples from Aluto, Fentale, and Kone volcanoes, Ethiopia. Data are referenced in Iddon et al., 2018: Mixing and Crystal Scavenging in the Main Ethiopian Rift Revealed by Trace Element Systematics in Feldspars and Glasses; https://doi.org/10.1029/2018GC007836.