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Sample S91-H199
NavDat sample number 37035 · BASALTIC-ANDESITE
Sample
| Sample ID | S91-H199 |
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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 at gate to Flag Point fire lookout. Reversed-polarity. Flag Point is small vent for lava that flowed northeast into Tygh Creek drainage. Plagioclase 5% and olivine <1% phenocrysts in an intergranular groundmass of plagioclase, augite, opaque minerals, and glass; rare alteration |
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Location
| Latitude | 45.3195 |
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| Longitude | -121.469 |
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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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| 1.92 |
|
1.72 |
2.12 |
|
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Analyses
No chemical analyses are stored for this sample.
