Sinkholes are depressions or holes in the ground caused by the collapse of a surface layer, often occurring in areas known as karst landscapes. These landscapes are characterized by soluble rock ...

Karst landscapes are shaped by the erosion of soluble carbonate rocks such as limestone, creating features such as sinkholes, caves and underground rivers. In a piece for The UNESCO Courier ...

Some habitats are easy to identify like forests, grasslands and wetlands ... disappearing streams, sinkholes, springs and caves. Matt Selig, president of the Indiana Karst Conservancy, has ...

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 addition, CAC members and volunteers repaired the wetland’s interpretive kiosk and replaced its roof. A portion of the funds were also used to pay for the repair of an erosion scar on Street Road ...

These sinkhole-susceptible areas are areas called "karst terrain," which covers about 20 percent of the U.S. We asked USGS geologist David Weary for his thoughts. He told Business Insider in an ...