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Sample USGSD-FG
NavDat sample number 10027 · GRANODIORITE
Sample
| Sample ID | USGSD-FG |
|---|
| Rock name | GRANODIORITE |
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| Rock type | PLUTONIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Comment | medium grained, uniformly textured; conspicuous hornblende and biotite, feldspar, and quartz, as well as euhedral sphene; weak primary foliation from alignment of mafic minerals |
|---|
Location
| Latitude | 45.4006 |
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| Longitude | -112.832 |
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| Location | outcrop at 6100 ft elevation on N side of Birch Creek Road, just W of Farlin Gulch; 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 |
|---|
| 70.6 |
|
67.4 |
73.8 |
|
|
Analyses
No chemical analyses are stored for this sample.
