Indiana Geological SurveyBEDROCK_GEOL_MM48_IN is a polygon shapefile that shows bedrock geology of the state of Indiana at a scale of 1:500,000. The mapped stratigraphic units include systems and selected groups, formations, and other stratigraphic units.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/6361d48ea6474579be22ce8371f49798_47engIndianaMapPublicBedrock Geology [Indiana]Web servicesIndianaLast Modified: 2025-09-24