A Tiankeng on Moun­tain Ridge: Mys­te­ri­ous For­ma­tion

China Scenic - - Special Report - Photo/ Shui Xiao­jie

Quanziya Tiankeng is the largest among its coun­ter­parts in Zhenba County, Hanzhong. Its open­ing stretches over 520 me­ters and its depth reaches 320 me­ters. The most sur­pris­ing thing about this tiankeng is that it was formed on a moun­tain range, rather than rel­a­tively flat land. Ge­ol­o­gists are still study­ing how such an un­usual phe­nom­e­non oc­curred.

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