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1. Areas of sinkholes and sinking-stream basins with locations of cave openings and springs in Central Southern Indiana
2002. Powell, Richard L., cartographer. This map data was compiled in 1997 from information available at the time, but was unpublished until 2002; the map does not reflect any changes in ...
2. Engineering Aspects of Karst
1984. Tobin, B. D. and Weary, David J. This polygon shapefile is a digital version of U.S. Geological Survey Open File Report 2004-1352, Engineering Aspects of Karst. The open-file repor... National Atlas of the United States.
3. Geoscape Nanaimo geoscience for central Vancouver Island communities /
Geological Survey of Canada,.
4. Number of Mapped Cave Entrances per Square Kilometer in Southern Indiana: Indiana
2002. Indiana Geological Survey. KARST_CAVE_DENSITY_IN is a polygon shapefile that shows the density (i.e., number per square kilometer) of mapped cave entrances in Silurian, Devon...