Who was an American writer responsible for a dissertation concerning  the towns and districts built near sediment formations around Lake Superior?
Iron Range Iron Range refers collectively or individually to a number of elongated iron-ore mining districts around Lake Superior in the United States and Canada. Despite the word "range," the iron ranges are not mountain chains, but outcrops of Precambrian sedimentary formations containing high percentages of iron. These cherty iron ore deposits are Precambrian in age for the Vermilion Range, while middle Precambrian in age for the Mesabi and Cuyuna Ranges, all in Minnesota. Similarly, the Gogebic Range in Wisconsin and the Marquette Iron Range and Menominee Range in Michigan. Natural ores and concentrates were produced from 1848 until the mid 1950s, when taconites and jaspers were concentrated and pelletized started to become the major source of iron production.
Lake Namakagon Lake Namakagon (pronounced NAM-uh-KAH-gun) is a large freshwater lake located in the Chequamegon National Forest in northern Wisconsin. The lake derives its name from the Ojibwe language, and it means "Lake abundant with sturgeons." It is known for tourism, fishing, and as the home of the legendary Anishinaabe Chief Namakagon.