Scale 1:100,000. Plates 2 and 3 were completed in 2011 as part of the USGS Statemap program. Additional plates, digital data and recomposed versions of Plates 2 and 3 were provided upon completion of the entire Atlas in 2013.; Surface and subsurface geology of Anoka County, Mn; The Anoka County Board of Commissioners; The U.S. Geological Survey Statemap program; The Minnesota Environment and Natural Resources Trust Fund as Recommended by the Legislative-Citizen Commission on Minnesota Resources