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.
A sinkhole can also be known to some as a sink, shake hole, swallow hole, swallet, or doline. A sinkhole typically is a natural depression or hole in the Earth's surface caused by karst processes â the chemical and rapid dissolution of carbonate rocks or processes for example in sandstone.