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Sample USGSD-M516-1
NavDat sample number 10035 · GRANITE
Sample
| Sample ID | USGSD-M516-1 |
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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 to coarse grained, unevenly textured, leucocratic; large, euhedral , equant quartz phenocrysts are conspicuous and distinctive; matrix consists of felted feldspars, minor biotite, and euhedral sphene; no primary foliation present |
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Location
| Latitude | 45.6644 |
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| Longitude | -113 |
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| Location | large outcrop N of open valley at 9050 ft elevation, NW of Bob's 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 |
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| 66.8 |
|
64.4 |
69.2 |
|
|
Analyses
No chemical analyses are stored for this sample.
