Physical Characteristics

What causes sinkholes?

A sinkhole is a depression shaped like a well or funnel that occurs in a land surface. Most common in limestone regions, sinkholes are usually formed by the dissolving action of groundwater or the seepage of above-ground streams into the limestone below, causing cracks or fractures in subterranean rock. The collapse of cave roofs can also cause large sinkholes or landslides. The resulting depression may be several miles in diameter.


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