Sphalerite from Silver Hill Mine, Silver Hill, Silver Hill Mining District, Carolina Slate Belt, Davidson County, North Carolina, USA
USA | |
| Koschmann, Albert Herbert, Bergendahl, M.H. (1968) Principal gold-producing districts of the United States. Professional Paper 610. US Geological Survey doi:10.3133/pp610 |
Bannister,Cowan and Company (1869) The Resources of North Carolina:Its Natural Wealth,Condition,and Advantages,as Existing in 1869 |