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Sample CH82-20A
NavDat sample number 11434 · BASALT
Sample
| Sample ID | CH82-20A |
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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 | fine to medium grained matrix of ophitic/subophitic to intergranular plagioclase, titanaugite , and altered olivine; interstitial oxide, oxide-rich mesostasis, glass and clay alteration; porphyritic and glomeroporphyritic plagioclase and microphenocrysts of olivine |
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Location
| Latitude | 42.0079 |
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| Longitude | -118.679 |
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| Location | lowest exposed basalt flow unconformably overlying metamorphic sequence on SW side of Denio Creek, Pueblo Mtns; Harney County |
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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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| 11.9 |
|
11.2 |
12.6 |
|
|
