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Late Devensian palaeoenvironmental changes in the sea area adjacent to Islay, SW Scotland : implications for the deglacial history of the island

Peacock, James D. 2008 Late Devensian palaeoenvironmental changes in the sea area adjacent to Islay, SW Scotland : implications for the deglacial history of the island. Scottish Journal of Geology, 44 (2). 183-190. 10.1144/sjg44020183

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Abstract/Summary

From a study of offshore borehole samples collected by the British Geological Survey in 1975, it is suggested that arctic marine or glaciomarine sediments of Dimlington Stadial (DS) age (>13 ka 14C ka bp) in Loch Indaal, Islay, were laid down following the retreat of a glacier from the head of the loch, possibly only a few hundred radiocarbon years before the opening of the Windermere Interstadial (WI, 13-11 14C ka bp). A reworked molluscan fauna in the DS sediments, which is identical to that living in the area today, is believed to be of last interglacial age or earlier. Sediments of WI age and Holocene age (<10 14C ka bp) have also been intersected in the boreholes. Deposits of Loch Lomond Stadial age (11-1014C ka bp) are absent from two boreholes investigated from Loch Indaal, but may be present in a borehole east of Islay. The proposal that ice of the Last Glacial Maximum reached only as far west as central Islay is unsupported by both this assessment and the published geomorphological evidence.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1144/sjg44020183
Programmes: BGS Programmes 2008 > Geology and Landscape Scotland
ISSN: 0036-9276
Additional Keywords: Islay, Devensian, Palaeoenvironments, Sea level changes
NORA Subject Terms: Earth Sciences
Date made live: 18 Dec 2008 11:38
URI: http://nora.nerc.ac.uk/id/eprint/5310

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