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Sample BL-774
NavDat sample number 8364 · SYENITE
Sample
| Sample ID | BL-774 |
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| Rock name | SYENITE |
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| Rock type | PLUTONIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Comment | aphanitic to very fine grained; seriate-porphyritic; phenocrysts are alkali feldspar and andesine; other minerals include salite, titaniferous magnetite, apatite, sphene, and biotite; some mafic xenoliths present |
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Location
| Latitude | 44.5071 |
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| Longitude | -104.444 |
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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 |
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| 48.5 |
|
43.65 |
53.35 |
|
|
