அடுத்த புளோரிடா வா சென்னை? | Reason Behind Formation of Sinkholes | human-made / natural sinkholes.

Sinkholes are cavities in the ground that form when water erodes an underlying rock layer. Two types of sinkholes exist. One forms when the roof of a cave collapses and exposes the underground cavern. The second type forms when water dissolves the rock underneath soil and creates an underground chasm.
Presented by : Mr. C.Gopikrishnan B.E Civil
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