Sinkholes and Karst Terrain Regions in America 1900 – 2015: Maps, Geological Data

“Karst” – noun, Geology Definition: an area of limestone terrain characterized by underground erosion, sinkholes, ravines, underground caves, caverns and streams.   The global phenomenon of suddenly forming sinkholes has unnerved humanity from Siberia to China to Utah and Florida. Sinkholes have been around since long before we were, but the intensity of recent extreme…