Allophane from San Juan County, Utah, USA
USA | |
| Bullock, Kenneth C. (1981) Minerals and mineral localities of Utah. Bulletin 117. Utah Geological and Mineral Survey |
| (2005) Mineral Resources Data System (MRDS), US Geological Survey. |
| USGS: Geological Survey Circular 217 |
Rocks & Minerals (1993) 68:6 pp381-393 USGS TEI #514 |