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Sample 8W21
NavDat sample number 14617 · ANDESITE
Sample
| Sample ID | 8W21 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | Porphyritic basaltic andesite |
|---|
Location
| Latitude | 46.4317 |
|---|
| Longitude | -122.144 |
|---|
| Location | Mt. St. Helens |
|---|
| State / province | Washington |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 25.05 |
|
16.4 |
33.7 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 53.3 | | WT% | AAS |
| AL2O3 | 18.2 | | WT% | AAS |
| FE2O3 | 3.2 | | WT% | AAS |
| FEO | 5.1 | | WT% | AAS |
| MGO | 4.4 | | WT% | AAS |
| CAO | 8.7 | | WT% | AAS |
| NA2O | 3.2 | | WT% | AAS |
| K2O | 0.56 | | WT% | AAS |
| H2O | 0.5 | | WT% | AAS |
| H2O_MINUS | 0.9 | | WT% | AAS |
| TIO2 | 1 | | WT% | AAS |
| P2O5 | 0.18 | | WT% | AAS |
| MNO | 0.15 | | WT% | AAS |
| TOTAL | 99.71 | | WT% | UNKNOWN |
