Northumberland role in the Industrial Revolution from the 18th century on. Many coal mines operated in Northumberland until the widespread closures in the 1970s and 1980s. Collieries operated at Ashington, Bedlington, Blyth, Choppington, Netherton, Ellington and Pegswood. The region's coalfields fuelled industrial expansion in other areas of Britain, and the need to transport the coal from the collieries to the Tyne led to the development of the first railways. Shipbuilding and armaments manufacture were other important industries before the deindustrialisation of the 1980s. Northumberland remains largely rural, and is the least-densely populated county in England. In recent years the county has
Polk Township, Monroe County, Indiana Polk Township, Monroe County, Indiana Polk Township is one of eleven townships in Monroe County, Indiana, United States. As of the 2010 census, its population was 360 and it contained 195 housing units. It is one of the least densely populated townships in the state; this is largely because most of the land is occupied by Lake Monroe, the Hoosier National Forest, and seasonal homes and attractions. Polk Township was established in 1849. It was established soon after the term of its namesake, James K. Polk, had ended. Epsilon II Archaeological Site and Kappa V Archaeological Site are listed on