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.
Eagle Harbor, Michigan Eagle Harbor is an unincorporated community and census-designated place located on the north side of the Keweenaw Peninsula within Eagle Harbor Township, Keweenaw County in the U.S. State of Michigan. Its population was 76 as of the 2010 census. M-26 passes through this community. This hamlet was especially popular with the sailors in days past, as it had a good steamboat landing and is about equally distant from Sault Sainte Marie, Michigan, and Duluth, Minnesota. It was the first stop for supplies for the many boats on Lake Superior.