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    Pilgrimstad revisited – a multi-proxy reconstruction of Early/Middle Weichselian climate and environment at a key site in central Sweden

    Wohlfarth, H. and Alexanderson, H. and Ampel, L. and Bennike, O. and Engels, Stefan and Johnsen, T. and Lundqvist, J. and Reimer, P. (2011) Pilgrimstad revisited – a multi-proxy reconstruction of Early/Middle Weichselian climate and environment at a key site in central Sweden. Boreas 40 (2), pp. 211-230. ISSN 0300-9483.

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    Abstract

    The site Pilgrimstad in central Sweden has often been cited as a key locality for discussions of ice-free/ice-covered intervals during the Early and Middle Weichselian. Multi-proxy investigations of a recently excavated section at Pilgrimstad now provide a revised picture of the climatic and environmental development between 80 and 36 ka ago. The combination of sedimentology, geochemistry, OSL and 14C dating, and macrofossil, siliceous microfossil and chironomid analyses shows: (i) a lower succession of glaciofluvial/fluvial, lacustrine and glaciolacustrine sediments; (ii) an upper lacustrine sediment sequence; and (iii) Last Glacial Maximum till cover. Microfossils in the upper lacustrine sediments are initially characteristic for oligo- to mesotrophic lakes, and macrofossils indicate arctic/sub-arctic environments and mean July temperatures481C. These conditions were, however, followed by a return to a low-nutrient lake and a cold and dry climate. The sequence contains several hiatuses, as shown by the often sharp contacts between individual units, which suggests that ice-free intervals alternated with possible ice advances during certain parts of the Early and Middle Weichselian.

    Metadata

    Item Type: Article
    School: School of Social Sciences, History and Philosophy > Department of Geography
    Depositing User: Stefan Engels
    Date Deposited: 13 Jan 2021 15:43
    Last Modified: 13 Jan 2021 15:43
    URI: https://eprints.bbk.ac.uk/id/eprint/41755

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