Sekinonoouketsu
関の尾の甌穴
Details
甌穴成生ノ種々ナル階段ヲ示スモノアリテ玻璃質霧島熔岩ノ上ヲ流ルヽ溝口川ノ河床ニ生ジ長サ約五百米ノ間ニ其ノ数千ヲ算スルヲ得ヘシ斯クノ如ク一個處ニ多数ノ甌穴ノ群集スルハ他ニ其ノ類例ヲ見ズ 浸蝕ニ関スル現象ノ天然紀念物トシテ最モ顕著ナルモノナリ
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