Griffin, W. L. (Geologist)Morey, G.B.Ojakangas, Richard W.Sims, Paul K.Map showing interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) around the Vermilion area, scale 1:125:000.PDFengMinnesota Geological SurveyPublicPreliminary geologic map of the Vermilion district and adjacent areas, northern Minnesota, M-5MapsMinnesota1968University of Minnesota