Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | U.S. GEOLOGICAL SURVEY, MENLO PARK DIVISION, MENLO PARK, CA 94025, USA |
| Reference | Trimble, Donald E; Carr, Wilfred J (1976) U. S. Geological Survey Bulletin, Report: B 1399, 104 pp., 1976 |