Geologic image in the Kentucky Geological Survey data repository.Image Name: Cover-Collapse Sinkhole, Jackson County Image Date: 1/31/2006 Category: photo_scene Source: Carey, Dan Format: JPG Size (MB): 0.8 Pixel Dimensions: 3292 x 1396 Description: An excellent example of a cover-collapse sinkhole in the Mississippian Slade Formation near U.S. 421 south of Big Hill in Jackson County. When soil covers a void space over a preexisting, buried sinkhole, a �soil arch� is formed, which may be a few inches or feet thick. If the soil arch collapses, a depression is formed on the ground surface over the sinkhole. Homeowners and builders should take every precaution to avoid these features, which may cause significant problems for structures [...]