← Search
Sample 8E199A
NavDat sample number 14625 · DACITE
Sample
| Sample ID | 8E199A |
|---|
| Rock name | DACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | Porphyritic vitrophyric dacite welded tuff |
|---|
Location
| Latitude | 46.2565 |
|---|
| Longitude | -122.062 |
|---|
| 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 | 63.8 | | WT% | AAS |
| AL2O3 | 13.5 | | WT% | AAS |
| FE2O3 | 3.17 | | WT% | AAS |
| FEO | 2.55 | | WT% | AAS |
| MGO | 0.65 | | WT% | AAS |
| CAO | 5.04 | | WT% | AAS |
| NA2O | 3.21 | | WT% | AAS |
| K2O | 0.5 | | WT% | AAS |
| H2O | 4.83 | | WT% | AAS |
| H2O_MINUS | 1.72 | | WT% | AAS |
| TIO2 | 0.62 | | WT% | AAS |
| P2O5 | 0.14 | | WT% | AAS |
| MNO | 0.16 | | WT% | AAS |
| TOTAL | 99.95 | | WT% | UNKNOWN |
