World-Class Tian Keng (Sky Pit) Geological Video Released
As a special karst landform, the sky pit is fascinating. Recently, the Shaanxi Provincial Department of Land and Resources released the interim results of geological relics investigation, one of which is: geological personnel in Hanzhong, Shaanxi, discovered four groups of sky pits consisting of 49 sky pits, ranking among the world’s top in terms of … Read more