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Sample 628
NavDat sample number 87987 · RHYODACITE
Sample
| Sample ID | 628 |
|---|
| Rock name | RHYODACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Collected by | Hildreth and others |
|---|
| Comment | Lava remnant that intrudes and overlies basement argillite |
|---|
Location
| Latitude | 48.8551 |
|---|
| Longitude | -121.813 |
|---|
| Location | Cougar Divide |
|---|
| State / province | Washington |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 1.015 |
|
0.997 |
1.033 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 72.1 | | WT% | XRF |
| TIO2 | 0.5 | | WT% | XRF |
| AL2O3 | 16.31 | | WT% | XRF |
| FEOT | 0.91 | | WT% | XRF |
| MNO | 0.02 | | WT% | XRF |
| MGO | 0.2 | | WT% | XRF |
| CAO | 1.85 | | WT% | XRF |
| NA2O | 4.63 | | WT% | XRF |
| K2O | 2.98 | | WT% | XRF |
| P2O5 | 0.09 | | WT% | XRF |
| LOI | 2.19 | | WT% | XRF |
| TOTAL | 96.8 | | WT% | XRF |
| RB | 50 | | PPM | XRF |
| SR | 274 | | PPM | XRF |
| Y | 21 | | PPM | XRF |
| ZR | 251 | | PPM | XRF |
| BA | 1090 | | PPM | XRF |
