Sabol, Joseph William2017-03-102017-03-101958http://hdl.handle.net/10919/76338no abstract provided by authorv, 81 leavesapplication/pdfen-USIn CopyrightLD5655.V855 1958.S236Quarries and quarrying -- Virginia -- Smyth County -- PorterfieldGeology of the Porterfield quarry area, Smyth County, VirginiaThesis