Britta J.L. Jensen
Transatlantic distribution of the Alaskan White River Ash
Jensen, Britta J.L.; Pyne-O’Donnell, Sean; Plunkett, Gill; Froese, Duane G.; Hughes, Paul D.M.; Sigl, Michael; McConnell, Joseph R.; Amesbury, Matthew J.; Blackwell, Paul G.; van den Bogaard, Christel; Buck, Caitlin E.; Charman, Dan J.; Clague, John J.; Hall, Valerie A.; Koch, Johannes; Mackay, Helen; Mallon, Gunnar; McColl, Lynsey; Pilcher, Jonathan R.
Authors
Sean Pyne-O’Donnell
Gill Plunkett
Duane G. Froese
Paul D.M. Hughes
Michael Sigl
Joseph R. McConnell
Matthew J. Amesbury
Paul G. Blackwell
Christel van den Bogaard
Caitlin E. Buck
Dan J. Charman
John J. Clague
Valerie A. Hall
Johannes Koch
Dr Helen Mackay helen.mackay@durham.ac.uk
Assistant Professor
Gunnar Mallon
Lynsey McColl
Jonathan R. Pilcher
Abstract
Volcanic ash layers preserved within the geologic record represent precise time markers that correlate disparate depositional environments and enable the investigation of synchronous and/or asynchronous behaviors in Earth system and archaeological sciences. However, it is generally assumed that only exceptionally powerful events, such as supereruptions (≥450 km3 of ejecta as dense-rock equivalent; recurrence interval of ∼105 yr), distribute ash broadly enough to have an impact on human society, or allow us to address geologic, climatic, and cultural questions on an intercontinental scale. Here we use geochemical, age, and morphological evidence to show that the Alaskan White River Ash (eastern lobe; A.D. 833–850) correlates to the “AD860B” ash (A.D. 846–848) found in Greenland and northern Europe. These occurrences represent the distribution of an ash over 7000 km, linking marine, terrestrial, and ice-core records. Our results indicate that tephra from more moderate-size eruptions, with recurrence intervals of ∼100 yr, can have substantially greater distributions than previously thought, with direct implications for volcanic dispersal studies, correlation of widely distributed proxy records, and volcanic hazard assessment.
Citation
Jensen, B. J., Pyne-O’Donnell, S., Plunkett, G., Froese, D. G., Hughes, P. D., Sigl, M., …Pilcher, J. R. (2017). Transatlantic distribution of the Alaskan White River Ash. Geology, 42(10), 875–878. https://doi.org/10.1130/g35945.1
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 21, 2014 |
Online Publication Date | Mar 9, 2017 |
Publication Date | 2017 |
Deposit Date | Oct 29, 2020 |
Journal | Geology |
Print ISSN | 0091-7613 |
Electronic ISSN | 1943-2682 |
Publisher | Geological Society of America |
Peer Reviewed | Peer Reviewed |
Volume | 42 |
Issue | 10 |
Pages | 875–878 |
DOI | https://doi.org/10.1130/g35945.1 |
Public URL | https://durham-repository.worktribe.com/output/1287952 |
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