GLACIAL DYNAMICS AND TRANSPORT OF DEBRIS DURING THE FINAL PHASES OF THE WEICHSELIAN GLACIATION, SOUTHWEST SKANE, SWEDEN

Late Weichselian glacial sediments were studied in three sections west of Lund, southwest Sweden. The lowermost sedimentary unit is a lodgem ent till containing rock fragments derived from the northeast-east. Fa bric analyses indicate successive ice flow directions: from the northe ast, east-northeast, south-southeast and then east. The last active ic e movement in the area was from the east. Above the lodgement till are deglaciation sediments consisting of melt-out till, flow till and gla ciofluvial sand and gravel deposited in a subaerial stagnant-ice envir onment. 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 o f the deglaciation deposits displays a gradual change, with upwards in creasing components of Cretaceous chalky limestone. The presence of th is rock type requires a period of glacial transport from the south. Th is stratigraphy cannot be explained with traditional glaciodynamic mod els. A possible scenario can, however, be constructed using a previous ly published model (Lagerlund, 1987) where marginal ice domes in the s outhwestern Baltic area interact with the main Scandinavian Ice Sheet.