← Search
Sample 27-220
NavDat sample number 11079 · PHONOLITE
Sample
| Sample ID | 27-220 |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | holocrystalline, often hydrothermally altered; aphanitic to strongly trachytic groundmass of sanidine microlites and cryptocrystalline albite, anortholcase, and analcime; phenocrysts of sanidine, altered feldspathoid, ferrosalite, and salite |
|---|
Location
| Latitude | 44.461 |
|---|
| Longitude | -104.404 |
|---|
| Location | Bear Lodge Mountains |
|---|
| State / province | Wyoming |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
38 |
50 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 60.62 | | WT% | XRF |
| AL2O3 | 19 | | WT% | XRF |
| FE2O3T | 4.44 | | WT% | XRF |
| MGO | 0.42 | | WT% | XRF |
| CAO | 0.31 | | WT% | XRF |
| NA2O | 3.17 | | WT% | XRF |
| K2O | 8.35 | | WT% | XRF |
| TIO2 | 0.67 | | WT% | XRF |
| P2O5 | 0.14 | | WT% | XRF |
| MNO | 0.03 | | WT% | XRF |
| TOTAL | 97.15 | | WT% | XRF |
