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Sample S91-H211
NavDat sample number 37052 · BASALT
Sample
| Sample ID | S91-H211 |
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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. Normal polarity; probably erupted from a shield volcano centered at an unnamed summit 2.9 km south of Big Bend Mountain. Seriate olivine 5% and plagioclase 1-2% phenocrysts in an intergranular groundmass of plagioclase, augite, opaque minerals, and traces of cryptocrystalline material or glas; all olivine phenocrysts have thin iddingsite rims. |
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Location
| Latitude | 45.448 |
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| Longitude | -121.946 |
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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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| 3.23 |
|
3.14 |
3.32 |
|
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Analyses
No chemical analyses are stored for this sample.
