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Sample BL-736
NavDat sample number 8362 · TRACHYTE
Sample
| Sample ID | BL-736 |
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| Rock name | TRACHYTE |
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| Rock type | PLUTONIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Comment | holocrystalline; contains phenocrysts of pseudoleucite, sanidine, and relict mafic minerals in aphanitic groundmass; groundmass of K feldspar microlites and limonite staining is usually trachytic but sometimes bostonitic |
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Location
| Latitude | 44.5168 |
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| Longitude | -104.452 |
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| Location | Warren Peaks area of Bear Lodge Mountains |
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| State / province | Wyoming |
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| Volcanic field | Bear Lodge intrusive complex |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 50.5 |
|
49.3 |
51.7 |
|
|
