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12 DieKuste, 74 ICCE (2008), 1-17 BALTIC ICF. LAKE 10 300 BP i' ISOBASES I I B I AND | SAUNE W AT I k I '1 FRESH WATER | ICE YOLDIA STAGE 10.000 BP ANCYLUS LAKE 9300-9200 BP Fig. 8: The development of the Baltic Sea during the late glacial and postglacial (Eronen et al., 2001) sion. Since this time, the connection to the North Sea has been permanent. The first period of the Littorina Sea is marked by a very rapid water level rise with rates up to 2.5 cm/year (Fig. 7). This transgression into the south-western Baltic region led to a widespread inunda tion of the pre-existing glacial relief without any erosion. The landscape was just drowning. The typical landforms to be submerged were pronounced ridges and terminal moraines, widespread areas of undulating basal moraines and imbedded meltwater channels, all associ ated with ice- and glacier-tongue shaped troughs and fjords. During the period of rapid sea level rise, all terrain lying below -5 m of the present MSL was flooded. Approximately 6,000 years BP, the water level almost reached its present position (Janke and Lampe, 2000). At this stage, wave impact as well as nearshore sediment dynamics began to effectively modify the coastal profile by intensive redeposition of sediments. Cliff coasts were eroded and cut back; longshore sediment transport led to the development of spits, sandy hooks and beach ridges (Schwarzer et ah, 2003). In the shallow water, small islands, built up of morainic material, were connected by these growing spits, initiating the develop ment of the famous baymouth (“Bodden”) coast (the term “Bodden” is the local name for the shallow, semi-enclosed coastal lagoons and backwaters behind the exposed Baltic Sea