Analytical method: COL OR AAS
| Technique | COL OR AAS |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | USGS DENVER, DENVER, CO, USA |
| Reference | Dickson, Jane J; Izett, Glen A (1981) Fission-track ages of air-fall tuffs in Pliocene basin-fill sediments near 111 Ranch, Graham County, Arizona. Isochron/West, no.32, pp.13-16, Dec 1981 |