Harris, Kenneth L.Lusardi, Barbara A.Tipping, Robert G.Quaternary geology map showing interpretations of Quaternary (Pleistocene [glacial] and Holocene [post-glacial]) surficial geology (distribution and type of materials at the land surface), of southern Red River Valley, Minnesota, scale 1:200,000.PDFengMinnesota Geological SurveyPublicQuaternary geology-Southern Red River Valley, Minnesota, RHA-3, Part A, Plate 1MapsMinnesota1995University of Minnesota