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The Holocene Storegga Slide tsunami in the United Kingdom

The Holocene Storegga Slide tsunami in the United Kingdom

Smith, David E., Shi, S., Cullingford, Robin A., Dawson, Alastair G., Dawson, Sue, Firth, Callum R., Foster, Ian D.L., Fretwell, Peter T., Haggart, Bruce Andrew ORCID: 0000-0001-7047-1674, Holloway, Lucy K. and Long, David (2004) The Holocene Storegga Slide tsunami in the United Kingdom. Quaternary Science Reviews, 23 (23-24). pp. 2291-2321. ISSN 0277-3791 (Print), 0277-3791 (Online) (doi:https://doi.org/10.1016/j.quascirev.2004.04.001)

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Abstract

All currently known sites in the United Kingdom with evidence for the Holocene Storegga Slide tsunami are described. Information on the altitude, distribution, stratigraphical context, age, particle size profile and microfossil characteristics of the deposits is presented. The tsunami involved a greater area than previously described, reaching a coastline over 600km long. The ubiquitous sand layer which forms the main deposit associated with the event is shown to exhibit a consistent morphology and a particle size profile marked by fining-upwards sequences. An analysis of new and previously published radiocarbon dates indicates that from evidence in the United Kingdom, the event took place sometime around 7100 radiocarbon years BP (7900 calibrated years BP). A new isobase model for mainland Scotland and adjacent areas, providing a preliminary estimate of land uplift since the tsunami, is presented. The model estimates contemporary sea surface level offshore at 14m below the present day mean high water spring tides. Tsunami sediment run-up is greatest in inlets, where it reaches at least 25m on Shetland and at least 5m along the mainland coastline to the south, and run-up of the tsunami would have exceeded these values. The tsunami sediments identified here are considered particularly valuable as a synchronous marker horizon.

Item Type: Article
Uncontrolled Keywords: Holocene, Storegga submarine landslide, Tsunami deposit, Scotland
Faculty / Department / Research Group: Faculty of Engineering & Science > Department of Pharmaceutical, Chemical & Environmental Sciences
Last Modified: 17 Oct 2016 09:13
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/12417

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