The conditions for the creation of an ice wall on the lake occur about once a decade, when the ice is thick enough and there are large variations in the daily temperatures. As the ice melts, it creates a chasm, but when it freezes again and expands, it forces the edge of the chasm upwards, creating the 'wall' effect.
Gusty winds and precipitation began pounding Finland from the southwest on Wednesday morning.
Sixty-three endangered Saimaa ringed seal pups were found during the early spring count carried out by forestry workers and volunteers.
Recent heavy snowfall and large drifts have created ideal conditions for the dens where the endangered Saimaa ringed seal raise their young, and a record number of pups may be born this year. The freshwater Saimaa ringed seal is one of the most endangered seal species in the world.
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