The most widespread type of masonry work is the erection of solid brick masonry using individual bricks set in mortar. âLight masonry,â consisting of two parallel face walls each one-half a brick thick and filled with a light concrete, loose slag, or another insulating material, is sometimes used.
A sinkhole, also known as a cenote, sink, sink-hole, shakehole, swallet, swallow hole, or doline (the different terms for sinkholes are often used interchangeably), is a depression or hole in the ground caused by some form of collapse of the surface layer.
Sinkholes are common in Florida because the bedrock underlying most of the state is either limestone or dolostone, which is naturally soluble and is easily dissolved by rainwater and groundwater. But sinkholes are also common in other areas of the United States and all over the world.