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长江三峡中国之最潭正双１．最大的天坑四川省奉节县小寨天坑位于长江三峡河谷深切区的边缘。它上部为椭圆形大坑，直径为５３７米至６２６米，深３２０米；下部为略成矩形的竖井，总面积为１１９３４．８立方米。有关专家考察结论为：世界上最大的天坑。２．最长的地缝四...
Three Gorges of the Three Gorges in China is the most double. The largest tiankeng Fengjie County, Sichuan Province Xiaozhai tiankeng is located in the Three Gorges Valley deep zone edge. The upper part is an oval pit with a diameter of 537 to 626 meters and a depth of 320 meters. The lower part is a slightly rectangular shaft with a total area of 11934.8 cubic meters. The experts concluded that: the world’s largest tiankeng. 2. The longest seam four ...