Limonite from selected localities.
USA | |
| Rudy Slingerland (Editor), 1995, Geology and History of Iron Production in Centre County, PA. Guidebook for the V.M. Goldschmidt Conference, An International Conference for the Advancement of Geochemistry |
| U.S. Geological Survey/ U.s. Department of the Interior |
Scotia, Patton Township, Centre County, Pennsylvania, USA