Glacial dynamics and transport of debris during the final phases of the Weichselian Glaciation, southwest Skåne, Sweden

• Published in: Journal of Quaternary Science
• Main Authors: Persson, Kärstin Malmberg, Lagerlund, Erik
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1994
• Subjects: Ice Sheet
• Online Access: http://dx.doi.org/10.1002/jqs.3390090305; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3390090305; https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3390090305

Abstract Late Weichselian glacial sediments were studied in three sections west of Lund, southwest Sweden. The lowermost sedimentary unit is a lodgement till containing rock fragments derived from the northeast‐east. Fabric analyses indicate successive ice flow directions: from the northeast, east‐northeast, south‐southeast and then east. The last active ice movement in the area was from the east. Above the lodgement till are deglaciation sediments consisting of meltout till, flow till and glaciofluvial sand and gravel deposited in a subaerial stagnant‐ice environment. The uppermost unit consists of glaciolacustrine clay and silt, containing abundant ice‐rafted debris, deposited during a short‐lived transgression phase when stagnant ice was still present in the area. At the westernmost site investigated, the petrographical composition of the deglaciation deposits displays a gradual change, with upwards increasing components of Cretaceous chalky limestone. The presence of this rock type requires a period of glacial transport from the south. This stratigraphy cannot be explained with traditional glaciodynamic models. A possible scenario can, however, be constructed using a previously published model (Lagerlund, 1987) where marginal ice domes in the southwestern Baltic area interact with the main Scandinavian Ice Sheet.