vostok
Well-Known Member
Russians are marvelling at rare ice walls - in places 5m (16ft) high - towering on the shores
of the Gulf of Finland near St Petersburg.
They were created by storms lashing the region in recent days.
Such phenomena are more characteristic of Russia's Arctic far east.
The walls are formed when a storm exerts sideways pressure on thick ice covering a sea,
river or lake. The ice is bad news for seals, though, as it can cut them off from the sea.
