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Sample 36-77
NavDat sample number 8455 · TRACHYTE
Sample
| Sample ID | 36-77 |
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| 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 | cryptocrystalline to microcrystalline, porphyritic; phenocrysts of oligoclase, anorthoclase, ferrohastingsite, Na-ferroaugite, and biotite; groundmass of anorthoclase, magnetite, quartz, biotite, apatite, and dolomite |
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Location
| Latitude | 44.5388 |
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| Longitude | -104.484 |
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| Location | Bear Lodge Mountain igneous complex |
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| State / province | Wyoming |
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| Volcanic field | Lytle Creek area |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 42 |
|
36.7 |
63.5 |
|
|
