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Sample S91-H47
NavDat sample number 37045 · BASALT
Sample
| Sample ID | S91-H47 |
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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. This flow overlies an andesite lava flow same roadcut, 75 m south with whole-rock K-Ar age of 2.70 +/- 0.03 Ma Keith and others 1985, their sample no 2. Olivine 3% and resorbed plagioclase 2% phenocrysts in an intergranular groundmass of plagioclase, augite, and opaque minerals; all olivine phenocrysts have a thin rind of iddingsite |
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Location
| Latitude | 45.4458 |
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| Longitude | -121.559 |
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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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| 2.43 |
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2.29 |
2.57 |
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Analyses
No chemical analyses are stored for this sample.
