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Sample WSP
NavDat sample number 37054 · BASALT
Sample
| Sample ID | WSP |
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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 upslope from Perham Creek Spring. Normal-polarity. An age of 3.67 +/- 0.17 Ma was obtained previously from approximately the same location Anderson, 1987; unit overlies and is down-faulted against Middle Miocene rocks of the Columbia River Basalt group. Sparse olivine phenocrysts in a subophitic groundmass of plagioclase, augite, opaque minerals, and cryptocrystalline material; traces of spotty iddinsite affect most olivine phenocrysts |
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Location
| Latitude | 45.6822 |
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| Longitude | -121.636 |
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| State / province | Oregon |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 3.53 |
|
3.45 |
3.61 |
|
|
Analyses
No chemical analyses are stored for this sample.
