Sandstone from Juab County, Utah, USA
USA | |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| Crittenden Jr, M. D. (1951). Manganese deposits of western Utah: US Geol. Survey Bull, 979, 1-62. |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |