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Sample USGSD-KW-39-74
NavDat sample number 6212 · ANDESITE
Sample
| Sample ID | USGSD-KW-39-74 |
|---|
| 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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| Comment | forms plug which cuts mineralized veins within mine; andesite is composed of microcrystalline feldspar, corroded hornblende phenocrysts, magnetite, and rare quartz and feldspar xenocrysts |
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Location
| Latitude | 45.2667 |
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| Longitude | -111.95 |
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| Location | El Fleeda Mine; Madison County |
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| State / province | Montana |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 51.1 |
|
49.9 |
52.3 |
|
|
Analyses
No chemical analyses are stored for this sample.
