Much like Pennsylvania, Kentucky is made up of karst terrain which ... for much of the rolling topography in the Bluegrass State. These subsistence sinkholes will often appear as depressions ...

Sinkholes are most common in "karst terrain," which the U.S. Geological Survey (USGS), an agency of the U.S. Department of Interior, describes as "regions where the types of rock below the land ...

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 ...

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 ...

Sinkholes are most common in karst terrains, where the rocks beneath the surface are limestone, carbonate rock, salt beds or another type of rock that is easily dissolved by running groundwater.

The public hearing on the zoning ordinance and map Wednesday night will be part of the board of supervisors meeting, which starts at 7 p.m. at the Upper Nazareth Township Municipal Building at 100 ...

It was the 32nd sinkhole recorded in the Baxiangping group of karst formations – the distinct, erosion-prone terrain that is known for land depressions and subsidence – since August 2023.