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Sample RH-14
NavDat sample number 34500 · TRACHYTE
Sample
| Sample ID | RH-14 |
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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 | nepheline normative; alkali feldspar and plagioclase phenocrysts along with clinopyroxene, hornblende, and rare phlogopite; no feldspathoid phenocrysts; groundmass ofsanidine laths, augite, magnetite, sphene, and apatite |
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Location
| Latitude | 42.7389 |
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| Longitude | -107.33 |
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| Location | Rattlesnake Hills |
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| State / province | Wyoming |
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| Volcanic field | Rattlesnake Hills alkalic complex, central alkalic province |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 44 |
|
32 |
44 |
|
|
