← Search
Sample F-68
NavDat sample number 5185 · ANDESITE
Sample
| Sample ID | F-68 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | dark grey to black trachyandesites |
|---|
Location
| Latitude | 38.3127 |
|---|
| Longitude | -119.352 |
|---|
| Location | Little Walker Center |
|---|
| State / province | California |
|---|
| Location comment | erupted around the margin and onto the floor of the caldera |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 9.65 |
|
8.6 |
10.7 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 55.39 | | WT% | XRF |
| TIO2 | 0.98 | | WT% | XRF |
| AL2O3 | 16.96 | | WT% | XRF |
| FE2O3 | 7.3 | | WT% | XRF |
| FEO | 6.57 | | WT% | XRF |
| MNO | 0.11 | | WT% | XRF |
| MGO | 4.94 | | WT% | XRF |
| CAO | 7.02 | | WT% | XRF |
| NA2O | 3.11 | | WT% | XRF |
| K2O | 2.78 | | WT% | XRF |
| P2O5 | 0.4 | | WT% | XRF |
| LOI | 0.72 | | WT% | XRF |
| TOTAL | 99.03 | | WT% | XRF |
| RB | 76.4 | | PPM | XRF |
| SR | 1078 | | PPM | XRF |
