Blue Pond (???, Aoi-ike)
Biei, Hokkaido Prefecture
It s a man-made pond and is the result of works on the Biei River (???), carried out after the 1988 eruption of Mount Tokachi to protect the town from volcanic mudflows.
The colour is thought to result from the accidental presence of colloidal aluminium hydroxide in the water.
Dimension:
512 x 640
File Size:
104.42 Kb
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