Show simple item record

Files in this item


Item metadata

dc.contributor.authorThompson, Polly I. J.
dc.contributor.authorDugmore, Andrew J.
dc.contributor.authorNewton, Anthony J.
dc.contributor.authorStreeter, Richard T.
dc.contributor.authorCutler, Nick A.
dc.identifier.citationThompson , P I J , Dugmore , A J , Newton , A J , Streeter , R T & Cutler , N A 2021 , ' Variations in tephra stratigraphy created by small-scale surface features in sub-polar landscapes ' , Boreas , vol. Early View .
dc.identifier.otherPURE: 276053924
dc.identifier.otherPURE UUID: e4f15949-7482-4b99-b496-abdaceeff75e
dc.identifier.otherRIS: urn:725F95D4D4F00DA907938C42E83F4A75
dc.identifier.otherORCID: /0000-0003-2261-4540/work/100901520
dc.descriptionFinancial support for this work was provided by NERC Doctoral Training Partnership Ph.D. studentship NE/L002558/1 to Polly I. J. Thompson.en
dc.description.abstractWe explore the effect small-scale surface features have on influencing the morphology and grain-size distribution (GSD) of tephra layers within the Quaternary stratigraphy of sub-polar landscapes. Icelandic thúfur, small cryogenic earth mounds, are used to assess how and why the morphology and GSD of tephra layers vary over such formations. Through measurement of tephra layer thickness and GSD, Hekla 1947 and Grímsvötn 2011 tephra layers are analysed. Results indicate that such microtopographic features do indeed alter the form of tephra deposits and therefore the tephra layer that is preserved in the stratigraphy. Tephra thickness is significantly greater in hollows than on the thúfur crests. There is greater variation in tephra thickness measurements from thúfur in comparison to control measurements from a surface where thúfur are absent. Thúfur crests contain larger grain sizes than hollows, for both H1947 and G2011 tephras; however this was only statistically significant for the G2011 tephra. Such morphological patterns are thought to arise from an interplay of tephra characteristics, altered topography from the thúfur formations and earth surface processes operating at the sites. This study provides insight into the potential of tephra layer morphology and internal structures as indicators of Quaternary landforms and processes. Additionally, it provides important context for the appropriate sampling of tephra layers to infer volcanological processes, as the characteristics of preserved layers do not necessarily reflect those of the original fall-out.
dc.rightsCopyright © 2021 The Authors. Boreas published by John Wiley & Sons Ltd on behalf of The Boreas Collegium. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.subjectGB Physical geographyen
dc.titleVariations in tephra stratigraphy created by small-scale surface features in sub-polar landscapesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Geography & Sustainable Developmenten
dc.contributor.institutionUniversity of St Andrews.Bell-Edwards Geographic Data Instituteen
dc.contributor.institutionUniversity of St Andrews.Environmental Change Research Groupen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record