An outline tephrochronology for the Holocene of the north of Ireland
β Scribed by JONATHAN R. PILCHER; VALERIE A. HALL; F. GERRY McCORMAC
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 726 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0267-8179
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β¦ Synopsis
Geochemically typed thin layers of Icelandic Holocene tephras form a tephrochronology for the north of Ireland. Tephrochronology construction is based on geochemical linkage with dated historic Icelandic eruptions and high-precision multisample radiocarbon dating. Comparison with geochemically typed Holocene layers at sites throughout Scotland and northern England shows that some layers are widespread throughout much of the northern British Isles. Other layers of known historic date have so far been detected only in Ireland.
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High-resolution gravity cores and box cores from the North Icelandic shelf have been studied for palaeoceanographic history based on lithological and biostratigraphical foraminiferal data. Results from two outer shelf cores covering the last 13.6 k 14 C yr BP are presented in this paper. The sedimen
The tephrochronology of Iceland and the North Atlantic region is reviewed in order to construct a unified framework for the last 400 kyr BP. Nearly all of the tephra layers described are also characterised geochemically. A number of new tephra layers are analysed for the first time for their geochem