Keywords: Leaf Hills.jpg Photograph of the Leaf Hills Moraines Leaf Mountains in the US State of Minnesota in central North America First published in 1895 by the US Geological Survey and republished in cite journal Upham Warren The Glacial Lake Agassiz Monographs of the United States Geological Survey XXV United States Geological Survey/University of North Dakota 1896/2002 http //www lib ndsu nodak edu/govdocs/text/lakeagassiz/plate08 jpg 2007-09-09 PD-old PD-USGov Geography of Minnesota Geology of Minnesota Lake Agassiz |