期刊
JOURNAL OF QUATERNARY SCIENCE
卷 16, 期 8, 页码 753-759出版社
WILEY
DOI: 10.1002/jqs.655
关键词
tephra; peat humification; Holocene proxy climate record; ombrotrophic mire; Scotland; Iceland
Four Holocene tephras of Icelandic origin have been identified and geochemically characterised from a water shedding blanket peat sequence on the Trotternish ridge, Isle of Skye, Scotland. Geochemical characterisation of the shards propose the Glen Garry tephra to be present, a tephra layer of Hekla origin incorporating shards from Hekla-4, as well as two new tephras dated by interpolation from a radiocarbon based chronology to ca. 830 cal. yr BP and ca. 2340 cal. yr BP. The new historic tephra has an ambiguous geochemistry and therefore has not been correlated with other known Icelandic historic tephras. The new prehistoric tephra is suggested as originating from the Snaefellsjokull volcano in northwest Iceland and forms an important stratigraphical marker in this Holocene sequence, A proxy climate record has been derived from humification analyses of the peat, which compares well with other regional palaeoclimatic reconstructions, as well as enabling correlations based on tephra geochemical linkages between sites and climatic records at precise times in the past. Copyright (C) 2001 John Wiley & Sons, Ltd.
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