Question: What is the name given to a number of elongated iron-ore mining districts around Lake Superior whose cities are known for their architecturally distinctive residences?

full_context: Document 1: Copper King Mansion: The Copper King Mansion, also known as the W. A. Clark Mansion, is a 34-room residence of Romanesque Revival Victorian architecture that was built from 1884 to 1888 as the Butte, Montana, residence of William Andrews Clark, one of Montana's three famous Copper Kings. The home features fresco painted ceilings, elegant parquets of rare imported wood, gas and electric chandeliers, ornate hand-carved fireplaces and stairways, and stained-glass windows. The mansion was added to the National Register of Historic Places in 1970.
Document 2: Patrick Casey House: The Patrick Casey House is a historic house in Aitkin, Minnesota, United States. It was built in 1901 in a mix of Queen Anne and Neoclassical styles. Original owner Patrick Casey (1849–1910) was a partner in the Potter/Casey Company, the region's leading retail chain. The house was listed on the National Register of Historic Places in 1982 for having local significance in the themes of architecture and commerce. It was nominated for its association with one of Aitkin's most prominent businessmen at the turn of the 20th century, and for being one of northern Minnesota's few architecturally distinctive residences outside of Duluth and the Iron Range cities.
Document 3: Gogebic Taconite: Gogebic Taconite is an iron-ore mining company in development stage, based in Florida, with a presence in Hurley, Wisconsin. The company, owned by the larger mining organizations, Cline Resource and Development Group, is at the center of a dispute among politicians, community groups, environmental organizations, Native American tribal councils and various stakeholders because of a proposed mining project scheduled for operation in Iron and Ashland counties in northern Wisconsin.
Document 4: 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.
Document 5: Northland Pyrite Mine: The Northland Pyrite Mine, also known as James Lake Mine, Rib Lake Mine, Harris Mine or simply Northland Mine, is an abandoned underground mine in Northeastern Ontario, Canada, located on the southwestern shore of James Lake in Best Township of Temagami. It was operated by the Northland Mining Company during the early 1900s with the construction of a 91 m shaft and many open-cuts north of the shaft. Minerals present at the mine include chalcopyrite, pyrite and pyrrhotite, deposited in Precambrian volcanic rock of the Canadian Shield.
Document 6: Watkins Manor House: The Watkins Manor House is a historic mansion in Winona, Minnesota, United States. It was built from 1924 to 1927 for Paul Watkins (1865–1931), second-generation leader of the J.R. Watkins Company and progenitor of its famous door-to-door sales strategy. It was designed in the Jacobethan style by architect Ralph Adams Cram. The house was listed on the National Register of Historic Places in 1984 as the Paul Watkins House for having local significance in the themes of architecture and commerce. It was nominated for its associations with Paul Watkins and the Watkins Company, and for its architecture, being a rare and unaltered example of a house designed by an architect better known for his churches and institutional buildings.
Document 7: E. H. Harrison House: The E. H. Harrison House in Keokuk, Iowa, United States was built in 1857. The combination Federal and Second Empire style house was listed on the National Register of Historic Places in 1984. It is believed that this is the first house in Iowa to have a Mansard roof. Its interior staircase is said to be one of seven in existence in the United States. The house was built by Enos H. Harrison, who was a successful business man originally from Elizabeth, New Jersey. In Iowa he helped establish the Iowa State Bank and served as its first president. He also helped to establish the waterworks in Keokuk, an insurance company and was involved with the Unitarian Church.
Document 8: John N. and Mary McQuilken House: The John N. and Mary McQuilken House, also known as the Emelia J. Schleeser House and the Joan E. Schreiber House, is a historic building located in La Porte City, Iowa, United States. McQuilken was a meat and poultry merchant, and then an insurance salesman. He and his wife Mary had no children. Built from 1900 to 1901, the house's architect and builder are unknown. It features Colonial Revival influences in its complex gambrel roof system and inset porch. Around 1960 the second floor was converted into an apartment. A renovation in the mid-1980s returned the house as much as possible to its original form. It was listed on the National Register of Historic Places in 1994.
Document 9: Canadian Shield: The Canadian Shield, also called the Laurentian Plateau, or "Bouclier canadien " (French), is a large area of exposed Precambrian igneous and high-grade metamorphic rocks (geological shield) that forms the ancient geological core of the North American continent (the North American Craton or Laurentia). Composed of igneous rock resulting from its long volcanic history, the area is covered by a thin layer of soil. With a deep, common, joined bedrock region in eastern and central Canada, it stretches north from the Great Lakes to the Arctic Ocean, covering over half of Canada; it also extends south into the northern reaches of the United States. Human population is sparse, and industrial development is minimal, while mining is prevalent.
Document 10: Patrick O'Donnell House: The Patrick O'Donnell House is the largest example of Italianate architecture in Charleston, South Carolina. It was built for Patrick O'Donnell (1806-1882), perhaps in 1856 or 1857. Other research has suggested a construction date of 1865. Local lore has it that the three-and-a-half-story house was built for his would-be bride who later refused to marry him, giving rise to the house's popular name, "O'Donnell's Folly." Between 1907 and 1937, it was home to Josephine Pinckney; both the Charleston Poetry Society and the Society for the Preservation of Spirituals were formed at the house during her ownership.
Document 11: Julius and Anine Oversen House: The Julius and Anine Oversen House is a historic building located in Sioux City, Iowa, United States. In 1888 D.T. and Mary Hedges sold the property on which this house and surrounding neighborhood sits to the city for development. This was in a period of economic expansion that saw Sioux City grow to become the second largest city in Iowa. Julius Oversen worked as a brick mason. He worked on the Sergeant Floyd Monument (1901) in Sioux City. He may have served as contractor for this house, which he had built for his family from 1899 to 1900. This section of the city is called Morningside, and at the time this house was built, the street in front was called Live Oak Street. It was changed to South Lemon Street in 1911 when Sioux City adjusted the names on the streets and addresses in Morningside to correlate with the rest of the city. The two-story brick Italianate house features a wraparound porch, segmental-arched windows, bracketed eaves, and a low-pitched hip roof. In addition to the house, the historic designation of this property includes a two-story frame carriage house, a cistern, an inground
Document 12: The Hotel Casey: The Hotel Casey was a famous hotel located in Scranton, Pennsylvania. Built in 1909 and demolished in 2001, the hotel stood for over 90 years. The hotel was built by Patrick J. and Andrew J. Casey (both successful brewers and bankers) for approximately $1,000,000. Construction began in 1909 and was completed in 1910. Charles R. Weatherhogg of Fort Wayne, Indiana, was the architect. The hotel formally opened on January 21, 1911. At the time it was the largest hotel in northeastern Pennsylvania with eleven stories and 250 rooms.
Document 13: Jackson Mine: The Jackson Mine is an open pit iron mine in Negaunee, Michigan, extracting resources from the Marquette Iron Range. The first iron mine in the Lake Superior region, Jackson Mine was designated as a Michigan State Historic Site in 1956 and listed on the National Register of Historic Places in 1971. The Lake Superior Mining Institute said, the mine "is attractive in the iron ore region of Michigan and the entire Lake Superior region, because of the fact it was here that the first discovery of iron ore was made, here the first mining was done, and from its ore the first iron was manufactured." Multiple other mines soon followed the Jackson's lead, establishing the foundation of the economy of the entire region. The mine is located northwest of intersection of Business M-28 and Cornish Town Road.
Document 14: Cuyuna Country State Recreation Area: Cuyuna Country State Recreation Area is a state park unit of Minnesota, USA, being developed to rehabilitate a portion of the Cuyuna Range where mining pits and piles of waste rock were left behind after decades of open-pit mining for iron ore. Abandoned by mining companies more than 20 years ago, the state recreation area consists of regenerated vegetation and clear lakes that draw a wide range of recreation enthusiasts. The park is located off Minnesota State Highway 210, northeast of Brainerd. The Croft Mine Historical Park, formerly city-run, is now part of the state recreation area.
Document 15: Iron Mountain Mine: Iron Mountain Mine, also known as the Richmond Mine at Iron Mountain, is a mine near Redding in Northern California, US. Geologically classified as a "massive sulfide ore deposit", the site was mined for iron, silver, gold, copper, zinc and pyrite intermittently from the 1860s until 1963. The mine is the source of extremely acidic mine drainage which also contains large amounts of zinc, copper and cadmium. One of America's most toxic waste sites, it has been listed as a federal Superfund site since 1983.
ground_truth: Iron Range