Sample A-11
NavDat sample number 67198 · TUFF
Sample
| Sample ID | A-11 |
|---|---|
| Rock name | TUFF |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
Location
| Latitude | 39.08 |
|---|---|
| Longitude | -106.58 |
| Location | grizzly peak cauldron |
| State / province | COLORADO |
| Formation | Grizzly Peak Tuff |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 33 | 29.7 | 36.3 |
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|---|---|---|---|
| SIO2 | 76.8 | WT% | XRF | |
| AL2O3 | 13.1 | WT% | XRF | |
| FE2O3 | 0.66 | WT% | XRF | |
| MGO | 0.24 | WT% | XRF | |
| CAO | 0.9 | WT% | XRF | |
| NA2O | 3.49 | WT% | XRF | |
| K2O | 4.61 | WT% | XRF | |
| TIO2 | 0.09 | WT% | XRF | |
| P2O5 | 0.02 | WT% | XRF | |
| MNO | 0.12 | WT% | XRF | |
| NB | 22 | PPM | XRF | |
| ZR | 62 | PPM | XRF | |
| Y | 32 | PPM | XRF | |
| SR | 110 | PPM | XRF | |
| RB | 176 | PPM | XRF | |
| SIO2 | 77.7 | WT% | EPMA | |
| AL2O3 | 12.6 | WT% | EPMA | |
| FEO | 0.22 | WT% | EPMA | |
| MGO | 0.05 | WT% | EPMA | |
| CAO | 0.5 | WT% | EPMA | |
| NA2O | 3.38 | WT% | EPMA | |
| K2O | 5.54 | WT% | EPMA |