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Dating the Glen Garry tephra: a widespread late-Holocene marker horizon in the peatlands of Northern Britain

Dating the Glen Garry tephra: a widespread late-Holocene marker horizon in the peatlands of Northern Britain
Dating the Glen Garry tephra: a widespread late-Holocene marker horizon in the peatlands of Northern Britain
The distal Icelandic tephra known as the Glen Garry layer has been dated by AMS 14C at eight ombrotrophic peat bogs from northern England and Scotland. The geochemistry of all the tephra layers is consistent with there being only one Glen Garry tephra, rather than two or more from eruptions of the same volcanic source. At seven of the sites, all in Scotland, the tephra layer was bracketed by 1 cm contiguous samples below, at and above the horizon. At the one English site, Walton Moss, Cumbria, a suite of 16 AMS dates was applied to a 116 cm section of a peat core containing the tephra. The resulting dates were calibrated and wiggle-matched using the BCal and Bpeat programmes to give an estimated age for the Glen Garry tephra of 2176 cal. BP, with a 2? range of 2210-1966 cal. BP. This 244 year range is an improvement on the 410 years calibrated date range for the date without the wiggle-match. This age estimate will allow future work on peat profiles and other sediments containing the tephra to use the date as a pinning-point in age/depth models and obviate the need for radiocarbon dating at this period.
tephra, radiocarbon, Glen Garry, peatlands, late-holocene, northern britain, iceland
0959-6836
31-43
Barber, Keith
83d1acae-326d-4cb5-94b6-3d1dc78d64e9
Langdon, Peter
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Blundell, Antony
e29b943e-9e1d-45c0-8c02-de306943e697
Barber, Keith
83d1acae-326d-4cb5-94b6-3d1dc78d64e9
Langdon, Peter
95b97671-f9fe-4884-aca6-9aa3cd1a6d7f
Blundell, Antony
e29b943e-9e1d-45c0-8c02-de306943e697

Barber, Keith, Langdon, Peter and Blundell, Antony (2008) Dating the Glen Garry tephra: a widespread late-Holocene marker horizon in the peatlands of Northern Britain. The Holocene, 18 (1), 31-43. (doi:10.1177/0959683607085594).

Record type: Article

Abstract

The distal Icelandic tephra known as the Glen Garry layer has been dated by AMS 14C at eight ombrotrophic peat bogs from northern England and Scotland. The geochemistry of all the tephra layers is consistent with there being only one Glen Garry tephra, rather than two or more from eruptions of the same volcanic source. At seven of the sites, all in Scotland, the tephra layer was bracketed by 1 cm contiguous samples below, at and above the horizon. At the one English site, Walton Moss, Cumbria, a suite of 16 AMS dates was applied to a 116 cm section of a peat core containing the tephra. The resulting dates were calibrated and wiggle-matched using the BCal and Bpeat programmes to give an estimated age for the Glen Garry tephra of 2176 cal. BP, with a 2? range of 2210-1966 cal. BP. This 244 year range is an improvement on the 410 years calibrated date range for the date without the wiggle-match. This age estimate will allow future work on peat profiles and other sediments containing the tephra to use the date as a pinning-point in age/depth models and obviate the need for radiocarbon dating at this period.

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More information

Published date: January 2008
Keywords: tephra, radiocarbon, Glen Garry, peatlands, late-holocene, northern britain, iceland

Identifiers

Local EPrints ID: 64236
URI: https://eprints.soton.ac.uk/id/eprint/64236
ISSN: 0959-6836
PURE UUID: 73d08095-82e7-448f-91f5-3183b72a5492
ORCID for Peter Langdon: ORCID iD orcid.org/0000-0003-2724-2643

Catalogue record

Date deposited: 17 Dec 2008
Last modified: 10 Sep 2019 00:51

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Contributors

Author: Keith Barber
Author: Peter Langdon ORCID iD
Author: Antony Blundell

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