Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Comment | Analyses by Karl Hoops |
| Institution | UNIVERSITY OF TEXAS AT AUSTIN, BUREAU OF ECONOMIC GEOLOGY, AUSTIN, TX, USA |
| Reference | Swanson, E R; Keizer, R P; Lyons, J I; Clabaugh, S E (1978) Tertiary volcanism and caldera development near Durango City, Sierra Madre Occidental, Mexico. Geological Society of America Bulletin, vol.89, no.7, pp.1000-1012, Jul 1978 |
Samples analysed with this method
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 19, 20, 21, 22