天坑地缝
介绍
小寨天坑
小寨天坑深度为521—662米,宽度为535—625米,总容积1.19亿立方米,从深度和容积两个指标看,均为世界第一大天坑。地质学名词“Tiankeng”就得名于小寨天坑。
天井峡地缝
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