Om Limfjordens postglaciale marine udvikling og niveauforhold, belyst ved mollusk-faunaen og C-14 dateringer

An investigation of the ecological conditions during the Flandrian stage (Holocene) of the Limfjord, a marine strait traversing northern Jutland (Denmark) from the North Sea in the west to the Kattegat in the east, has been undertaken. The investigation was based on subfossil marine molluscs. The stratigraphical sequences were elucidated on the basis of beach gravel complexes, supported by C-14 datings of organic debris in the deposits. Two transgressions, occurring respectively in the Atlantic and the Subboreal, have been demonstrated. Species of molluscs hitherto known only from the Subboreal Dosinia beds in the Kattegat area have also been found in the western part of the fjord-area. Beds with Donax vittatus indicate that an open sea environment connecting the Limfjord with the Jammerbugt existed during the Early and Middle Subatlantic.