Supplementary Material for:
Temporal variations in storage conditions of the post-collapse rhyolites,
Valles Caldera, New Mexico (USA)
Magdalen A. Grismer and Laura E. Waters

Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM 87801, USA.

We accomplished this work through the generosity of Robert Palmer with the Valles Caldera National Preserve, and the New Mexico Bureau of Geology and Mineral Resources collection. We began this as the first project of a first year Ph.D. student in August, 2020, and at the time strict limitations were in place regarding sample collection and analysis due to COVID-19 safety requirements. No additional permitting to collect samples was allowed in the Valles Caldera preserve, so we relied on previously collected samples from both the preserve collection as well as the New Mexico Bureau of Geology. Though we would have preferred multiple samples from each dome, this was not feasible as many samples showed excessive weathering and oxidation, precluding our analyzing them for accurate storage conditions. This study is also primarily a petrographic and EPMA study because no other analytic options were available. Strict limits were in place on the number of people allowed on campus and in labs, such that only one person was allowed in any lab, including sample preparation and the electron microprobe lab. While additional analytic methods would greatly add to this work, we had no access to additional methods, such as melt inclusion measurements or CL imaging, and so present a microprobe study with petrogenetic modeling.