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Sample 21-85B
NavDat sample number 11076 · PHONOLITE
Sample
| Sample ID | 21-85B |
|---|
| 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 | 44.4781 |
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| Longitude | -104.433 |
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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 | 55.45 | | WT% | XRF |
| AL2O3 | 17.53 | | WT% | XRF |
| FE2O3T | 3.47 | | WT% | XRF |
| MGO | 1.47 | | WT% | XRF |
| CAO | 5.28 | | WT% | XRF |
| NA2O | 3.46 | | WT% | XRF |
| K2O | 5.91 | | WT% | XRF |
| TIO2 | 0.51 | | WT% | XRF |
| P2O5 | 0.14 | | WT% | XRF |
| MNO | 0.14 | | WT% | XRF |
| TOTAL | 93.36 | | WT% | XRF |
