Close-up of the northwestern ice-sheet margin in Inglefield Land. The Hiawatha impact crater was discovered beneath the semi-circular ice margin. The structure is also imprinted on the shape of the ice surface, even though it lies nearly 1,000 meters below the ice surface. Hiawatha is named after outlet glacier at the edge of the ice sheet. The name was given by Lauge Koch in 1922 during an expedition around northern Greenland, while thinking of the pre-colonial native American leader and co-founder of the Iroquois Confederacy.