Indiana Geological SurveyKARST_MM65_IN is a polygon shapefile that shows sinkhole areas and sinking-stream basins associated with rocks of Silurian, Devonian, and Mississippian age in southern Indiana.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/4d6419969bee4d568872d5dd0e4029b0_116engIndianaMapPublicKarst Sinkhole Areas [Indiana]Web servicesIndianaLast Modified: 2024-12-21