suture

In comparison with the similar karst landforms in the world, it is concluded that: Xiaozhai Tiankeng is a typical and the biggest collapsed one by dimensions, and Tianjinxia is a very unusual and unique fissure karst gorge in the world.

天坑地缝风景名胜区位于重庆市奉节县南部,发育有小寨天坑、天井峡地缝式岩溶峡谷等独特的岩溶景观。

Tianjinxia is a very unusual fissure karst gorge in the world, with 6 162 m continuous long, 229 m at the deepe.

小寨天坑、天井峡地缝式喀斯特峡谷位于重庆市奉节县南部深切割峰丛谷地区,发育在一个流域面积280km2,落差1600m的喀斯特水文系统中,与巨大的地下河相连。