Affiliation: | Quaternary Palaeoenvironments Group, Department of Geography, University of Cambridge, Downing Place, Cambridge, CB2 3EN, UK (E-mail: ); Department of Geography, University of Sheffield, Winter Street, Sheffield, S10 2TN, UK; Centre for Quaternary Research, Department of Geography, Royal Holloway, University of London, Egham, Surrey, TW20 0EX, UK |