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Sample W-85
NavDat sample number 37031 · BASALTIC-ANDESITE
Sample
| Sample ID | W-85 |
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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 | Lava Collected in abandoned quarry above Forest Rd. Reversed-polarity Corresponds to Wise locality 85 Wise, 1969 and to sample 79LP1109 of Keith and others 1985. The latter is from a talus cone or slide block below our sampling locality and has a weighted mean age of 1.38 +/- .10 Ma. Underlies andesite of Hiyu Mtn, which has a virtually identical weighted mean age of 1.38 +/- 0.06 Ma. Olivine 2-3% phenocrysts in an intergranular groundmass of plagioclase, augite, and opaque minerals; traces of alteration |
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Location
| Latitude | 45.4387 |
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| Longitude | -121.839 |
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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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| 1.24 |
|
0.55 |
1.93 |
|
|
Analyses
No chemical analyses are stored for this sample.
