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Sample BL-84
NavDat sample number 8421 · TRACHYTE
Sample
| Sample ID | BL-84 |
|---|
| Rock name | TRACHYTE |
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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, aphanitic, distinctly porphyritic; phenocrysts of orthoclase, aegirine-augite, melanite, and sphene; trachytic groundmass of orthoclase microlites and minor aegirine |
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Location
| Latitude | 44.4738 |
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| Longitude | -104.484 |
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| Location | Bear Lodge Mountains, Houston Creek area |
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| State / province | Wyoming |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 43.9 |
|
36.7 |
51.1 |
|
|
