Sea stone or pebbles, which we all loved to collect as a child on the black sea beaches, has an interesting history. Millions of years ago, the formation of the Caucasus mountains occurred with the rapid eruption of volcanoes, streams of lava in the form of plates, debris and small pieces were carried away by the flow of mountain rivers and fell into the sea. The sea waves continued to grind and roll the shards, crushing and giving the stones a rounded shape.

圖片編號： 149187948
拍攝者： Vanyunya