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The presence of Holocene cryptotephra in Wales and southern England
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Number of Authors: 5
2017 (English)In: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 32, no 4, 493-500 p.Article in journal (Refereed) Published
Abstract [en]

There have been few detailed studies into the tephrostratigraphy of southern Britain. We report the tephrostratigraphy of two sites, one in southern England (Rough Tor, Cornwall) and one in Wales (Cors Fochno, west Wales). Our study extends the known southernmost reach of Icelandic cryptotephra in northern Europe. Given the large distance between sites in southern England and eruptive sources (e.g. Iceland 1500-1700km distant), most of the cryptotephra layers consist of sparse numbers of shards, even by the standards of distal tephrostratigraphy (as low as 3 shards cm(-1)), each layer spanning only 1 or 2cm in depth. We identify multiple cryptotephra layers in both sites, extending the known distribution of several tephra layers including the MOR-T4 tephra (approximate to AD 1000) most probably of Icelandic origin, and the AD 860 B tephra correlated to an eruption of Mount Churchill, Alaska. The two sites record contrasting tephrostratigraphies, illustrating the need for the inclusion of multiple sites in the construction of a regional tephrostratigraphic framework. The tephra layers we describe may provide important isochrons for the dating and correlation of palaeoenvironmental sequences in the south of Britain.

Place, publisher, year, edition, pages
2017. Vol. 32, no 4, 493-500 p.
Keyword [en]
chronology, peatlands, tephra, volcanic ash
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:su:diva-144712DOI: 10.1002/jqs.2942ISI: 000401172500004OAI: oai:DiVA.org:su-144712DiVA: diva2:1127975
Available from: 2017-07-20 Created: 2017-07-20 Last updated: 2017-07-20Bibliographically approved

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Wastegård, Stefan
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CiteExportLink to record
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Citation style
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