1. Common in limestone regions sinkholes are usually formed by the dissolving of groundwater or the seeping of above ground streams into the limestone. Causing cracks or fractures in subterranean rock. The collapse of cave roofs can also cause large sinkholes.
2. it is the result of water main and storm pipes that have been separated or broken irrigations systems.
3. They start to get more unstable, get bigger, and more form.
4. The sinkhole could have harmful waste in it.
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