Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30'x60' quadrangles, Wisconsin and Michigan / W.F. Cannon [and others]W.F CannonOpen the Tome
Preliminary digital geologic map of the Penokean (Early Proterozoic) Continental Margin in northern Michigan and Wisconsin / by W.F. Cannon and D. OttkeW.F CannonOpen the Tome
![Placeholder cover for Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30'x60' quadrangles, Wisconsin and Michigan / W.F. Cannon [and others]](/images/parchment.webp)