Karst Sinkhole Areas

KARST_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.KARST_MM65_IN 为多边形形状文件（shapefile），描绘了印第安纳州南部与志留纪、泥盆纪及密西西比纪时期岩层相关的塌陷坑区域与下沉溪流流域。