https://conservancy.umn.edu/items/8232fba0-5842-4c06-9382-bbf13a1a2bbf
Geology and Exploration Geochemistry of the Glacial Deposits of Northeastern Itasca County,...
Late Wisconsinan glaciation produced two lobes of the Laurentide ice sheet in northeastern Minnesota: the Rainy Lobe and St. Louis Sublobe of the Des Moines...
geology and explorationof thegeochemistry