The stratigraphy and genesis of the Dösebacka and Ellesbo drumlins. A contribution to the knowledge of the Weichselglacial history in western Sweden

The Weichsel-glaciation is represented by a very complicated stratigraphy in the Dösebacka and Ellesbo drumlins, situated on the western slope of the Göta River Valley. It can be subdivided into six cold-warm stages, which are represented by on one hand till beds and glaciofluvial beds, on the other hand interstadial clay and sand layers and first of all deflation surfaces. The older interstadial is called the Older Dösebacka-Ellesbo-interstadial and it is correlated with the Brorup interstadial in Denmark. A mammoth tusk from Dösebacka has been C14-dated at 36 000 B.P. which however is a minimum age since shellac used for preservation purposes may not have been extracted completely. The younger interstadial is called the Younger Dösebacka-Ellesbo-interstadial and it is correlated with the Hengelo-Denekamp-interstadials in Holland. Organic matter from sand layers at Ellesbo, and clay lamina at Dösebacka, have been C14-dated at 30 300 and 24 020 B.P., respectively. The inland ice during the Weichsel glaciation reached its maximum during the last stadial. Then the land was deeply depressed by at least a hundred metres. During all the Weichsel-stadials the ice moved from the NE. towards the SW.