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Sample 622
NavDat sample number 87997 · RHYODACITE
Sample
| Sample ID | 622 |
|---|
| Rock name | RHYODACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Collected by | Hildreth and others |
|---|
| Comment | Stratified welded tuff Intercalated fall, flow, and surge deposit |
|---|
Location
| Latitude | 48.8074 |
|---|
| Longitude | -121.727 |
|---|
| Location | South Rim of Caldera |
|---|
| State / province | Washington |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 1.215 |
|
1.199 |
1.231 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 71.2 | | WT% | XRF |
| TIO2 | 0.43 | | WT% | XRF |
| AL2O3 | 15.07 | | WT% | XRF |
| FEOT | 2.44 | | WT% | XRF |
| MNO | 0.06 | | WT% | XRF |
| MGO | 1.14 | | WT% | XRF |
| CAO | 2.62 | | WT% | XRF |
| NA2O | 2.95 | | WT% | XRF |
| K2O | 3.56 | | WT% | XRF |
| P2O5 | 0.12 | | WT% | XRF |
| LOI | 4.14 | | WT% | XRF |
| TOTAL | 95.46 | | WT% | XRF |
| RB | 87 | | PPM | XRF |
| SR | 332 | | PPM | XRF |
| Y | 13 | | PPM | XRF |
| ZR | 140 | | PPM | XRF |
| BA | 883 | | PPM | XRF |
