Bulletins consist of illustrated text, maps and cross-sections. Most are bedrock reports from 1950-1969 at a scale of 1:62,500. Paper copies were lost in the flood in 2011.
Georeferenced map images for the Bulletins and the Environmental Geology Series are posted at http://geothermal.isgs.illinois.edu/ArcGIS/rest/services/aasggeothermal
Photograph (M. Kierstad): Towers at Belvidere Mtn.