Jigsaw: Biwako » Jigsaw Puzzle game
Jigsaw: Biwako
The sun that sets in Biwako. The lake side is dyed to the evening glow color.
< history of Biwako >
Is it in almost four million years to be able to do Biwako?It was a faulttrough lake (Oyama rice field lake) that was able to have been done by diastrophism in present Iga city Hirata six million years ago. It is said that this gradually moves to the north, and it arrived in the shape stopped to Mt. Hira-san at the position of present Biwako. There was a mountain (Fl mountain range) in the position of present Biwako before the lake of the Oyama rice field, the Suzuka mountain range had not upheaved yet, and the river in the Biwako southeast part of today flowed to the Ise bay. The main geological features of the Suzuka mountain range are conglomerates as it is proven. Moreover, it is said that the Yasu river located in the southeast in the greatest river that flows in Biwako flowed to not the west at that time but the east.
It is assumed thirdly that it is an old ancient lake in the lake in the world after Baikal and the Tanganica lake.