蔦沼
周囲1キロの蔦沼（Tsuta Swamp）は、散策路沿いにある六沼の中で最大です。これらの沼は、何千年も前に標高1,298メートルの赤倉岳（ここから左に見えます）の斜面が突然発生した岩屑なだれで崩落し、この谷の景観を一変させたときにつくりだされました。岩屑なだれは山体の上部の柔らかく脆弱なベースに脆い岩が形成されることで発生します。この構造は「豆腐の上に載る文鎮」に例えられ、少しの衝撃でも崩壊し、ものすごい速さのなだれを発生させます。
Title Tsutanuma
- Aomori
- Topic(s)：
- Historic Sites/Castle Ruins Nature/Ecology National Parks/Quasi-National Parks
- Medium/Media of Use：
- Interpretive Sign
- Text Length：
- ≤250 Words
- FY Prepared：
- 2021
- Associated Tourism Board：
- Towada-Hachimantai National Park
- Associated Address：
- Okuse, Towada-shi , Aomori
English
Tsutanuma
Tsutanuma, or Tsuta Swamp, is 1 kilometer in circumference, making it the largest of the six swamps on the trail. The swamps were created thousands of years ago when the slope of 1,298-meter-high Mt. Akakura (visible to the left) suddenly collapsed in a debris avalanche, transforming the valley landscape. Debris avalanches occur when brittle rock forms on the upper reaches of the mountain on top of a softer, more fragile base. The configuration has been described as similar to “a paperweight sitting on tofu,” and it can crumble at the slightest impact, with the avalanche reaching incredible speeds.
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