Normally, the hole collapse Takes place in the plains near the mountain is limestone. The limestone has dissolved with acidic soft. With limestone with faults. And many cracks can be observed.
By bedding the sinkhole in the plains near the mountain limestone is because limestone is soluble properties with a weak acid. The limestone mountains with many cracks and fault it will be noticed.
usually hole collapse will occur in the area in the plains near the mountain limestone limestone because there are features that are water soluble acid is combined with the light is a limestone mountain range of the Slide and cracks as you noticed