Chert from
USA | |
| Rocks & Min.: 60:84. |
| [var. Novaculite] Carpenter, P. Albert III (1976) Metallic Mineral Deposits of the Carolina Slate Belt. Bulletin 84. North Carolina Geological Survey |
| Christopher P.Indorf,1981,Economic Geology (v.76,p.1170)The Silver Hill zinc deposit and associated deposits,central North Carolina |