|   | 
     
         
          |   | 
          Main 
            Author: | 
            | 
          Minnesota Geological Survey | 
         
         
          |   | 
          Title/Description: | 
            | 
          Geologic map of Duluth and vicinity, 
            St. Loius County, Minnesota | 
         
         
          |   | 
          Publication 
            Info: | 
            | 
          Minneapolis: Minnesota Geological Survey, 1964; 
            Bulletin 44, Plate 1 | 
         
         
          |   | 
          Date: | 
            | 
          1964 | 
         
         
          |   | 
          Scale: | 
            | 
          1:24,000 | 
         
         
          |   | 
          Original 
            Source: | 
            | 
          Courtesy of Murray 
            Hudson, Halls, Tennessee  | 
         
        |