Grant, James AOreskovich, Julie A2017-05-312017-05-312016-12Project No. 1801-10416-20090Project No. 1750-10416-20090-1000004145https://hdl.handle.net/11299/188297The geology on which the present maps are based is from field work and petrology done from 1965-1967.en-USMorton area MinnesotaArchean geologyPrecambrian rocksPetrologic dataMinnesota River ValleyNatural Resources Research InstituteUniversity of Minnesota DuluthArchean Geology of the Minnesota River Valley Sacred Heart to Morton GeologyNatural Resources Research Institute MapMap