Analytical method: TIMS
| Technique | TIMS |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Comment | G.L. Farmer, analyst |
| Institution | UNIVERSITY OF COLORADO, USA |
| Reference | Anonymous (1991) Oligocene ash flow volcanism, northern Sierra Madre Occidental; role of mafic and intermediate-composition magmas in rhyolite genesis. Journal of Geophysical Research, B, Solid Earth and Planets, vol.96, no.8, pp.13,389-13,411, 30 Jul 1991 |