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Original article

UIS KHS Commission
Speleogenesis and Evolution of Karst Aquifers, 2006, Vol 4, Issue 9
Tiankengs: definition and description
Abstract:

A tiankeng is a type of very large collapse doline that has evolved by roof collapse over a large cave chamber where a huge mass of breakdown debris has been removed by a substantial cave river. Described first in China, the term tiankeng is recognised as a useful term within the worldwide lexicon of karst.