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Sample KW-912-67
NavDat sample number 4099 · BASALT
Sample
| Sample ID | KW-912-67 |
|---|
| Rock name | BASALT |
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| Rock type | VOLCANIC |
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| Composition | MAFIC |
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| Material | IGNEOUS |
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| Collected by | K.L. Wier |
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| Comment | dark-grey to black; scattered pyroxene phenocrysts only 5% of rock in groundmass of plagioclase, pyroxene, and iron oxide |
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Location
| Latitude | 45.2883 |
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| Longitude | -111.941 |
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| Location | Alder Gulch at the placer gold discovery site monument which is 0.5 miles S 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 |
|---|
| 32.7 |
|
31.3 |
34.1 |
|
|
Analyses
No chemical analyses are stored for this sample.
