Terrestrial biotas and environmental changes during the late Weichselian in north Jylland

Studies of glaciotectonized sub-till lacustrine deposits in Lønstrup Klint and Lodbjerg Klint, northern Jylland, Denmark, show the presence of plant and ani-mal remains from the Middle Weichselian "mammoth steppe". Radiocarbon dates on picked-out plant fragments yield ages around 30 ka BP, and a macrofossil plant assemblage in the lake sediments indicates that uplands were covered by an open, tree-less vegetation with herbs and scattered shrubs. Mean July temperatures were probably at least 6°C lower than at present. The datings suggest a change from marine to glacio-lacustrine environments in Vendsyssel slightly before 30 ka BP. Glacial thrusting and subsequent deposition of the youngest till in the region was connected with the Late Weichselian glacial maximum, the Jylland stade, and glaciation commenced some time after 30 ka BP