Tag:geological=sinkhole
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 geological = sinkhole
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| Description |
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| A depression or hole in the ground caused by some form of collapse of the surface |
| Group: natural |
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| Useful combination |
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| Status: in use |
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In geology 
sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water enters into underground passages known as ponor, swallow hole or swallet.