1. Department of Geography, University of Turku, FIN-20014 Turku, Finland
2. Centre for Quaternary Research, Royal Holloway, University of London, Egham, TW20 0EX, UK
3. Postgraduate Research Institute for Sedimentology, The University of Reading, PO Box 227, Reading RG6 6AB, UK
4. Centre for Environmental Management, School of Geography, University of Nottingham, University Park, Nottingham NG7 2RD, UK