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Sample W-115
NavDat sample number 37043 · BASALTIC-ANDESITE
Sample
| Sample ID | W-115 |
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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 | Outcrop in lava from Rocky Butte a conduit filled plug in eroded cinder cone on east side of Grasshopper Point shield volcano. Corresponds to Wise locality 115 Wise, 1969. Polarity not measured. Age similar to sample no 15 from main shield. Plagioclase 8-10%, olivine <1%, augite <1%, and rare opaque oxide phenocrysts in a seriate to very fine-grained groundmass of plagioclase, pyroxene, and opaque minerals; some olivine is strongly iddingsitized and some is fresh; opaque minerals are sporadically altered to hematite |
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Location
| Latitude | 45.2525 |
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| Longitude | -121.502 |
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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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| 2.28 |
|
2.17 |
2.39 |
|
|
Analyses
No chemical analyses are stored for this sample.
