Contours on the Surface of the Precambrian Rocks in Dane County Open-file report; contains unpublished data that has not yet been peer-reviewed. Bedrock Geology Precambrian Bedrock Topography Data and Resources WOFR1972-07 Contours on the Surface of the Precambrian Rocks in Dane County Olcott, P.G.; 1972 Map: Scale 1:62,500 Download Related Collections Open-File Report View Open-File Report