Sinkhole is a
depression or hole in the ground caused by some form of collapse of the surface
layer. Some are caused by karst processes—for example, the chemical dissolution of carbonate
rocks or suffosion processes. Sinkholes may vary in size from 1 to 600 m (3.3 to
2,000 ft) both in diameter and depth, and vary in form from soil-lined
bowls to bedrock-edged chasms. Sinkholes may be formed gradually or suddenly,
and are found worldwide.
1st stadia: at first there was a small crack due to the fault
and burly then formed holes due to water ingress. This area usually occurs in
areas of limestone composed of soluble.
2nd stadia: because of the presence of an underground stream,
it will appear as the bottom of the cavity was eroded by underground streams.
3rd, 4th, 5th and 6th
stadia: this process continues with the scraping and dropping of rocks on it.
Until ultimately the perforation is formed space wide enough, so that the upper
soil layer vanish.
7th stadia: blung! This hole doesn’t entirely meet the basic
bottom up, due to the volume of rock above doesn’t entirely fill the missing.
Depth of the hole can be just a few meters up to 100 meters like the one in
Guatemala.
8th stadia: deposition process on the hollows is finally cole
the hole. This cyclic process lasted for thousands of years.
