Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Reference | Hawkins, James W (1970) Petrology and possible tectonic significance of late Cenozoic volcanic rocks, southern California and Baja California. Geological Society of America Bulletin, vol.81, no.11, pp.3323-3338, 1970 |