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Sample S91-H206
NavDat sample number 37032 · ANDESITE
Sample
| Sample ID | S91-H206 |
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| Rock name | 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 | Andesite of Hiyu Mtn, roadcut in lava flow. Reversed-polarity TRM measured using alternating-current demagnetization to remove induced component; fails to exhibit dipole behavior with fluxgate magnetometer. Plagioclase phyric approximately20%, two-pyroxene, rare opaque mineral andesite with a very fine-grained intergranular groundmass of plagioclase, pyroxene, opaque minerals, and biotite?; traces of hematite in groundmass |
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Location
| Latitude | 45.4668 |
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| Longitude | -121.873 |
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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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| 1.34 |
|
1.1 |
1.58 |
|
|
Analyses
No chemical analyses are stored for this sample.
