Malachite from Agathla Peak (El Capitan), Mineral Mining District, Navajo County, Arizona, USA
USA | |
| Witkind, Irving J. & Thaden (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache & Navajo Cos., AZ, USGS Bull. 1103: 144. |
Witkind, I.J. (1963), Geology and uranium-vanadium deposits of the Monument Valley area, Apache and Navajo counties, Arizona, USGS Bull. 1103: 72-75 142-144. |