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Sample KW-19-66
NavDat sample number 4097 · ANDESITE
Sample
| Sample ID | KW-19-66 |
|---|
| Rock name | ANDESITE |
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| Rock type | VOLCANIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Collected by | K.L. Wier |
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| Comment | phenocrysts of andesine and also biotite and magnetite; cloudy microcrystalline groundmass; believed to be erosional remnant of a lava flow |
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Location
| Latitude | 45.2986 |
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| Longitude | -111.935 |
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| Location | rock quarry N of Virginia City; Madison County |
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| State / province | Montana |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 51 |
|
47.2 |
54.8 |
|
|
Analyses
No chemical analyses are stored for this sample.
