Holocene Eustatic Oscillations of the Baltic Sea Level

Ya. M. Punning


Geochronological, biostratigraphic and geomorphological researches have been used to refine the Holocene northern Baltic territories of the USSR. The Baltic Sea coast over this epoch has been characterized by neotectonic movements, so that without knowledge of relationships between vertical movement rates of crustal motion and eustatic oscillations it is difficult to conduct interregional correlations. To determine the eustatic curve for the Baltic the author assumed the rate of long-term (inherited) vertical movements in the past 10,000 years to be constant, and on this basis glacioisostatic uplift curves were plotted. The Baltic eustatic curve suggests a progressive alternation of transgressive and regressive conditions for regions with different glacioisostatic uplift gradients. In the early and middle Holocene time there are four transgressive /regressive cycles (9,700 - 9,000, 9,000 -7,900, 7,900 - 6,700 and 6,700 - 5,600 14C yr BP) have been identified which can be correlated with the Yoldia, Ancylus and two Littorina stages. The height of the Ancylus Lake level was nearly 16 m above the world ocean level. The proposed eustatic curve for the Baltic is used to make interregional correlations.


Baltic Sea; eustatic oscillations; Holocene; sea level

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