Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | USGS RESTON, BRANCH OF EASTERN MINERAL RESOURCES, RESTON, VA 22092, USA |
| Reference | Hague, Arnold (1892) Geology of the Eureka District, Nevada. Monograph - U. S. Geological Survey. 1892. |