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Sample USGSD-M1228-1
NavDat sample number 10033 · GRANITE
Sample
| Sample ID | USGSD-M1228-1 |
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| Rock name | GRANITE |
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| Rock type | PLUTONIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | medium grained; equigranular plagioclase, K-feldspar, quartz, and biotite and hornblende, giving motley appearance; faint to absent igneous folation |
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Location
| Latitude | 45.5506 |
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| Longitude | -112.976 |
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| Location | outcrop at 8980 ft elevation on lower slope of Mount Tahepia, SE of Tahepia Lake; 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 |
|---|
| 71.7 |
|
69.1 |
74.3 |
|
|
Analyses
No chemical analyses are stored for this sample.
