Grout, Frank F. (Frank Fitch), 1880-1958Schwartz, George M. (George Melvin), 1892-1980Sharp, R.P. (Surveyor)Plate 5, Sequence of volcanic lava flows along shore from the Lake County line to Good Harbor Bay, Minnesota, scale 1 inch = about 3/4 miles.PDFengMinnesota Geological SurveyPublicGeology of Cook County, Minnesota, Bulletin 39, Plate 6MapsMinnesota1959University of Minnesota