Yoldia Sea

[2] Current rounded estimates are 11.7 to 10.7 ka BP equivalent to about 9,750–8,750 calendar years BCE.

It characterizes the middle phase of the Yoldia Sea, during which saline water poured into the Baltic, before the acceleration of glacial melting.

The Baltic Ice Lake, the Yoldia Sea, the Ancylus Lake and the Littorina Sea are four recognized stages in the postglacial progression of the Baltic basin – there are also transition periods which can be considered as substages.

[3] From earliest to most recent they run: The Baltic Ice Lake came to an end when it overflowed through central Sweden and drained.

A channel at the location of the Neva River connected Yoldia Sea to Lake Ladoga.

[4] The land uplift in south-central Sweden as the glaciers retreated, stopped the water inflow from the world sea by 10.7 ka BP.

At 10.2 ka BP the lake/sea broke through Denmark creating the first Great Belt channels and the Dana River along the new outlet.

The total opening was less than 1 km (0.62 mi) wide and included two channels at the northern end.