This type of sinkhole is more common in residential areas. Sinkholes can also occur naturally around materials like limestone, dolomite or gypsum, which are more likely to dissolve in water over time.

Sinkholes can be characterized into two types. First, there are cover-collapse sinkholes, which can develop abruptly (over a period of hours) and cause catastrophic damages.

The last type of sinkholes are the most catastrophic and are called the cover-collapse sinkholes. This occurs when sediments have a large amount of clay, officials said.

Sinkholes are most common in karst terrains, where the rocks beneath the surface are limestone, carbonate rock, salt beds or another type of rock that is easily dissolved by running groundwater.

Sinkholes of this type need a specific type of geology; you need certain rocks prone to dissolution. It is common in the Middle East and the United States for example.

Sinkholes are most common in what geologists call karst terrain, which involves types of rock including limestone below the land surface that can naturally be dissolved by groundwater circulating ...

Information about the nature of sinkholes in Florida and the proper protocol to use if you encounter one in an urban area.