city, seat of Sudbury district, southeastern Ontario, Canada, on Ramsey Lake, 40 miles (65 km) north of Georgian Bay of Lake Huron. It was named for Sudbury, Suffolk, England. Its settlement began with the location of a station of the new Canadian Pacific Railway on the site. Copper- and nickel-bearing ores were discovered there in 1883-84 during the railway's construction, and smelting operations got under way in 1888.
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