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Sample L-948
NavDat sample number 3851 · MONZONITE
Sample
| Sample ID | L-948 |
|---|
| Rock name | MONZONITE |
|---|
| Rock type | PLUTONIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Collected by | author |
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| Comment | phenocrysts of orthoclase, quartz, plagioclase, and biotite in quartz and orthoclase groundmass |
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Location
| Latitude | 44.3908 |
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| Longitude | -103.753 |
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| Location | along road to Mt Roosevelt summit |
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| State / province | South Dakota |
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| Volcanic field | Sheep Mountain stock |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 50.7 |
|
49.2 |
52.2 |
|
|
Analyses
No chemical analyses are stored for this sample.
