Petrified Wood from selected localities.
USA | |
| Scarborough, Robert B. (1981), Radioactive occurrences and uranium production in Arizona, Arizona Bureau of Geology and Mineral Technology Report for U.S. Department of Energy (Atomic Energy Commission), GJBX-143. RME-2071: 106. |
Frondel, C. (1958), Systematic mineralogy of uranium and thorium, USGS Bull. 1064: 123. | |
| Witkind, I.J. & R.E. Thaden (1963), Geology of uranium-vanadium deposits of the Monument Valley area Apache & Navajo Cos., AZ, USGS Bull. 1103: 73 (Table 1), 138-139. |
Witkind, I.J. & R.E. Thaden (1963), Geology of uranium-vanadium deposits of the Monument Valley area Apache & Navajo Cos., AZ, USGS Bull. 1103: 73 (Table 1), 138-139. |