Aerial Sinkhole (2 Clips) (Stock Footage)

Aerial Sinkhole (2 Clips) (Stock Footage)

2 Clips. Cinematic 4K. Aerial sinkhole cenote sink sink-hole shakehole swallet swallow hole doline surface layer collapse ground depression karst carbonate rocks chemical dissolution soil-lined bowls bedrock edged chasms pit cavity hollow trench sink excavation gully drainage large limestone roof caves lowering soluble void cement below underground bottom land beds naturally natural quartzite dissolve sudden deep wells well crevasses crevasse slit slot fissure cleft split crack fracture crevice rift fissure coalpit bore ground-water field plain flat layers soil texture structure danger dangerous aperture slot cavity cliff gulf precipice badlands obruk konya karapinar turkey cave. 4K UHD 3840×2160.

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