Answer:
Sinkholes are common where the rock below the land surface is limestone,
carbonate rock, salt beds, or rocks that can naturally be dissolved by
ground water circulating through them. As the rock dissolves, spaces
and caverns develop underground. Sinkholes are dramatic because the land usually
stays intact for a while until the underground spaces just get too big. If
there is not enough support for the land above the spaces then
a sudden collapse of the land surface can occur. These collapses can be
small, as the picture below shows, or they can be huge and can
occur where a house or road is on top.
The most damage from sinkholes tends to occur in Florida, Texas, Alabama,
Missouri, Kentucky, Tennessee, and Pennsylvania. The picture below shows a sinkhole that quickly opened up in Florida, damaging a swimming
pool, a road, and buildings.
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