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Sample S91-H208
NavDat sample number 37055 · BASALT
Sample
| Sample ID | S91-H208 |
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| 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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| Comment | Roadcut in lava flow. Reversed-polarity. Sample collected from lowest mafic lava exposed along road. Overlies middle or upper Miocene andesite. Olivine 1-2% and plagioclase 1-2% phenocrysts in an intergranular groundmass of plagioclase, augite, and opaque minerals; many olivine phenocrysts have faint wispy traces of iddingsite |
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Location
| Latitude | 45.4085 |
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| Longitude | -121.906 |
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| State / province | Oregon |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 3.65 |
|
3.4 |
3.9 |
|
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Analyses
No chemical analyses are stored for this sample.
