Emelyanov, E. M., Vaikutienė, G.
Holocene environmental changes during tran sition Ancylus-Litorina
stages in the Gdansk Basin, south-eastern Baltic Sea
Two sediment cores have been obtained from the southern and
eastern parts of the Gdansk Basin for lithological, geochemical and diatom
analysis. The data revealed provides information about environmental changes
during the transition of the Ancylus Lake to the Litorina Sea stages. The
Ancylus Lake transgression and regression phases have been well traced in the
diatom flora of the shallower, eastern slope of the Gdansk Depression, whereas
mentioned water level changes have not been detected in the deepwater
(southern) part of the basin. The Litorina Sea has been clearly defined
according to geochemical, lithological and diatom analysis. The Initial
Litorina Sea transition was observed as gradually increasing numbers of
brackish water diatoms and higher contents of Corg and N in the sediments, when
saline water influx reached the basin before 7600±184 cal. yr BP.