Sanbaseki Gorge
三波石峡
A scenic river gorge on the Gunma-Saitama border featuring unique green metamorphic rocks and forty-eight famous named stones.
What it is
- A nationally designated Scenic Spot and Natural Monument on the upper Kanna River.
- The type locality for the Sambagawa Metamorphic Belt featuring green schist rocks.
- A geological site downstream from the Shimokubo Dam formed 65 million years ago.
- A major distribution center for stones used in traditional Japanese gardens.
What to see
- Green schist rocks with distinct white quartz veins throughout the gorge.
- Forty-eight uniquely named famous stones scattered along the riverbed.
- Minerals like chlorite and epidote that give the landscape its characteristic green color.
- Restored river landscapes resulting from a long-term sediment flushing project.
Notes written by Japan Gems from facts in Japanese Wikipedia.
Where it is
Sanbaseki Gorge Open in Google Maps
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