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Sample 21-73A
NavDat sample number 11077 · PHONOLITE
Sample
| Sample ID | 21-73A |
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| Rock name | PHONOLITE |
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| Rock type | VOLCANIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| 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 |
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Location
| Latitude | 44.4838 |
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| Longitude | -104.428 |
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| Location | Bear Lodge Mountains |
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| State / province | Wyoming |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
38 |
50 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 51.32 | | WT% | XRF |
| AL2O3 | 18.66 | | WT% | XRF |
| FE2O3T | 2.63 | | WT% | XRF |
| MGO | 1.62 | | WT% | XRF |
| CAO | 6.03 | | WT% | XRF |
| NA2O | 1.89 | | WT% | XRF |
| K2O | 8.72 | | WT% | XRF |
| TIO2 | 0.63 | | WT% | XRF |
| P2O5 | 0.12 | | WT% | XRF |
| MNO | 0.16 | | WT% | XRF |
| TOTAL | 91.78 | | WT% | XRF |
