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Sample USGSD-M913-1
NavDat sample number 10042 · RHYODACITE
Sample
| Sample ID | USGSD-M913-1 |
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| Rock name | RHYODACITE |
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| Rock type | PLUTONIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | phenocrysts of plagioclase and quenched augite in groundmass of microlites and glass, a few opaques, and a trachytic texture |
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Location
| Latitude | 45.7506 |
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| Longitude | -112.779 |
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| Location | Beaverhead County |
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| State / province | Montana |
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| Volcanic field | Pioneer Batholith |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 47.8 |
|
46.1 |
49.5 |
|
|
Analyses
No chemical analyses are stored for this sample.
