While humans can cause sinkholes in areas without karst, the areas of Pennsylvania with the highest karst features are more susceptible to sinkholes. According to the DCNR’s GEOlogic Data map ...

forming underground caves and cracks called karst formations (Figure 2a). Further erosion of bedrock along the cave ceilings caused collapses leaving visible sinkholes. Figure 2b shows areas of on ...

In early December, a 64-year-old woman was found dead in Pennsylvania after falling into a sinkhole. The sinkhole initially “began as a manhole-sized gap and may have only recently opened above ...

Sinkholes are the largest and most frequent hazard to karst regions, according to Kentucky Emergency Management. Data obtained from the 2010 U.S. Census indicates about 67% of the state’s ...

Sinkholes usually form over time by a phenomenon called karst processes in which groundwater breaks down minerals in the underlying soluble rock. The dissolved minerals create spaces inside the ...