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Sample F-56
NavDat sample number 5178 · ANDESITE
Sample
| Sample ID | F-56 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | light grey trachyandesite, rhyodacite, and quartz latite domes and flows |
|---|
Location
| Latitude | 38.3106 |
|---|
| Longitude | -119.432 |
|---|
| Location | Mahogany Ridge |
|---|
| State / province | California |
|---|
| Location comment | erupted along the east and west margins and locally within the center of the caldera |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 33.4 |
|
1.8 |
65 |
Tertiary |
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 60.47 | | WT% | XRF |
| TIO2 | 0.83 | | WT% | XRF |
| AL2O3 | 17.16 | | WT% | XRF |
| FE2O3 | 5.8 | | WT% | XRF |
| FEO | 5.22 | | WT% | XRF |
| MNO | 0.1 | | WT% | XRF |
| MGO | 2.29 | | WT% | XRF |
| CAO | 5.69 | | WT% | XRF |
| NA2O | 3.55 | | WT% | XRF |
| K2O | 2.97 | | WT% | XRF |
| P2O5 | 0.36 | | WT% | XRF |
| LOI | 0.43 | | WT% | XRF |
| TOTAL | 99.22 | | WT% | XRF |
| RB | 79.5 | | PPM | XRF |
| SR | 1261 | | PPM | XRF |
