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dc.contributor.authorClarke, Ben
dc.contributor.authorCalder, Eliza S.
dc.contributor.authorDessalegn, Firawalin
dc.contributor.authorFontijn, Karen
dc.contributor.authorCortés, Joaquín A.
dc.contributor.authorNaylor, Mark
dc.contributor.authorButler, Ian
dc.contributor.authorHutchison, William
dc.contributor.authorYirgu, Gezahegn
dc.identifier.citationClarke , B , Calder , E S , Dessalegn , F , Fontijn , K , Cortés , J A , Naylor , M , Butler , I , Hutchison , W & Yirgu , G 2019 , ' Fluidal pyroclasts reveal the intensity of peralkaline rhyolite pumice cone eruptions ' , Nature Communications , vol. 10 .
dc.identifier.otherPURE: 258865963
dc.identifier.otherPURE UUID: af8fd6fc-f025-4d92-b798-892d9a5c8825
dc.identifier.otherRIS: urn:3293F5EC0ECCDF7401E00282545269AE
dc.identifier.otherRIS: Clarke2019
dc.identifier.otherScopus: 85065206984
dc.identifier.otherWOS: 000466338600003
dc.descriptionThis work is a contribution to the Natural Environment Research Council (NERC) funded RiftVolc project (NE/L013932/1, Rift volcanism: past, present and future) through which several of the authors are supported. In addition, Clarke was funded by a NERC doctoral training partnership grant (NE/L002558/1).en
dc.description.abstractPeralkaline rhyolites are medium to low viscosity, volatile-rich magmas typically associated with rift zones and extensional settings. The dynamics of peralkaline rhyolite eruptions remain elusive with no direct observations recorded, significantly hindering the assessment of hazard and risk. Here we describe uniquely-preserved, fluidal-shaped pyroclasts found within pumice cone deposits at Aluto, a peralkaline rhyolite caldera in the Main Ethiopian Rift. We use a combination of field-observations, geochemistry, X-ray computed microtomography (XCT) and thermal-modelling to investigate how these pyroclasts are formed. We find that they deform during flight and, depending on size, quench prior to deposition or continue to inflate then quench in-situ. These findings reveal important characteristics of the eruptions that gave rise to them: that despite the relatively low viscosity of these magmas, and similarities to basaltic scoria-cone deposits, moderate to intense, unstable, eruption columns are developed; meaning that such eruptions can generate extensive tephra-fall and pyroclastic density currents.
dc.relation.ispartofNature Communicationsen
dc.rightsCopyright © The Author(s) 2019. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectGE Environmental Sciencesen
dc.titleFluidal pyroclasts reveal the intensity of peralkaline rhyolite pumice cone eruptionsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Earth & Environmental Sciencesen
dc.description.statusPeer revieweden

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