What is Sinkhole?
Sinkhole is a cavity in the ground that cause by water erosion . Sinkhole can casue by naturally and by human's activity, like water main break or overwithdrawl of ground water.
How sinkholes form
Sinkholes can form in two different types of way. Cover-subsidence sink hole and Cover-collapse sinkhole.
Cover-subsidence sinkholes are form slowy over time.