Publications Catalog

Devils Lake State Park is a place of striking geologic contrasts, where some of the oldest rock exposed in southern Wisconsin lies next to some of the youngest geologic materials in the state. The purple rock (called Baraboo quartzite) in the walls of Devils Lake gorge is more than 1.7 billion years old; the glacially deposited ridges that block both ends...

Brief technical description of Wisconsin’s geologic history, glacial phases and lobes, and correlation and distribution of Pleistocene units. Heavily illustrated.