Middle Proterozoic to Cambrian Rocks in Central Wisconsin: Anorogenic Sedimentary and Igneous Activity Bedrock Geology Precambrian Bedrock Data and Resources FTGB08 Middle Proterozoic to Cambrian Rocks in Central Wisconsin: Anorogenic Sedimentary and Igneous Activity Greenberg, J.K.; Brown, B.A.; 1983 Report: 50 p. Download Related Collections Field Trip Guide Book View Field Trip Guide Book