Extent of the last ice sheet in northern Scotland tested with cosmogenic Be-10 exposure ages

William M. Phillips, Adrian M. Hall, Colin Kerr Ballantyne, Steven Binnie, Peter W Kubik, Stewart Freeman

    Research output: Contribution to journalArticlepeer-review

    49 Citations (Scopus)

    Abstract

    The extent of the last British-Irish Ice Sheet (BIIS) in northern Scotland is disputed. A restricted ice sheet model holds that at the global Last Glacial Maximum (LGM; ca. 23-19 ka) the BIIS terminated on land in northern Scotland, leaving Buchan, Caithness and the Orkney Islands ice-free. An alternative model implies that these three areas were ice-covered at the LGM, with the BIIS extending offshore onto the adjacent shelves. We test the two models using cosmogenic Be-10 surface exposure dating of erratic boulders and glacially eroded bedrock from the three areas. Our results indicate that the last BIIS covered all of northern Scotland during the LGM, but that widespread deglaciation of Caithness and Orkney occurred prior to rapid warming at ca. 14.5 ka. Copyright (C) 2008 John Wiley & Sons, Ltd.

    Original languageEnglish
    Pages (from-to)101-107
    Number of pages7
    JournalJournal of Quaternary Science
    Volume23
    Issue number2
    DOIs
    Publication statusPublished - Feb 2008

    Keywords

    • Scotland
    • last ice sheet
    • Be-10 exposure dating
    • deglaciation chronology
    • ET-AL. 2002
    • GLACIAL MAXIMUM
    • GREAT-BRITAIN
    • SCOTTISH PERSPECTIVE
    • NORTHWEST SCOTLAND
    • OUTER HEBRIDES
    • IRELAND
    • SEA
    • DEGLACIATION
    • STREAM

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