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Sample BTH-1
NavDat sample number 37038 · BASALTIC-ANDESITE
Sample
| Sample ID | BTH-1 |
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| Rock name | BASALTIC-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 | Roadcut in lava flow. Reversed-polarity. Probably a lava flow erupted from Booth Hill cinder cone, 3.5 km to the south. Olivine 4% and augite 1-2% phenocrysts in an intergranular-intersertal groundmass of plagioclase, pyroxene, opaque minerals, and brown glass; all olivine phenocrysts have iddingsite rims; traces of hematite in groundmass |
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Location
| Latitude | 45.6233 |
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| Longitude | -121.526 |
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| State / province | Oregon |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 2.07 |
|
1.47 |
2.67 |
|
|
Analyses
No chemical analyses are stored for this sample.
