Sample 227
NavDat sample number 87993 · RHYODACITE
Sample
| Sample ID | 227 |
|---|---|
| Rock name | RHYODACITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Collected by | Hildreth and others |
| Comment | Dome with 250 m relief, intrudes and overlies ignimbrite near south-central margin of caldera |
Location
| Latitude | 48.8119 |
|---|---|
| Longitude | -121.729 |
| Location | Oreamnos Dome |
| State / province | Washington |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 1.114 | 1.103 | 1.125 |
Analyses
No chemical analyses are stored for this sample.
References
- Hildreth, Wes; Lanphere, Marvin A; Champion, Duane E; Fierstein, Judy (2004) Rhyodacites of Kulshan Caldera, north Cascades of Washington;post-caldera lavas that span the Jaramillo. Journal of Volcanology and Geothermal Research, vol.130, no.3-4,pp.227-264, 29 Feb 2004 doi:10.1016/S0377-0273(03)00290-7