LACUSTRINE SEDIMENTATION AND TECTONICS - AN EXAMPLE FROM THE WEICHSELIAN AT LONSTRUP-KLINT, DENMARK

Sedimentological analysis of the Weichselian deposits exposed in the c oastal clin section at Lonstrup Klint, northern Jutland, Denmark, demo nstrates the presence of four sedimentary units comprising fine-graine d lacustrine and fluvial deposits of the latest Middle Weichselian. Th e Lonstrup Klint section also shows an interplay between glaciotectoni cs and sedimentation. The two lower sedimentary units are separated by an erosional unconformity of pretectonic origin, whereas the upper tw o units are syntectonic. The glaciotectonic processes reflect the Late Weichselian expansion of the Scandinavian ice cap into northern Jutla nd. The sedimentary structures indicate high rates of deposition. The area underwent dramatic palaeogeographic changes from deep lake to pro glacial fluvial plain in a time-span of a few thousand years.