Biostratigraphic investigations, mainly pollen-analytical studies of lake sediments, have permitted the recognition of the Alleröd as well as the Böiling oscillations on Mt. Kullen in NW Scania. By correlation with other sites this supports the theory that the Böiling zone corresponds to the deglaciation from North Scania to Central Småland, in varve and radiocarbon years about 10,400–10,100 B. C., and that the Alleröd zone corresponds to the deglaciation of Central and North Småland to the Fennoscandian end moraines about 9,900–9,100 B.C. There is some evidence for local vegetational differentiation due to climate and soil. On the basis of the chemical stratigraphy, soil leaching around the lakes is discussed.