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Sample BE-488
NavDat sample number 32828 · RHYOLITE
Sample
| Sample ID | BE-488 |
|---|
| Rock name | RHYOLITE |
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| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | top of phenocrysts-rich lower part of unit; phenos of K-feldspar, plag, qtz, altered mafics, hypersthene, ox, and zircon and apatite; one K-feldspar has reaction rim of tiny plag crystals |
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Location
| Latitude | 42.25 |
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| Longitude | -116.75 |
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| Location | Owyhee River canyon south of Lambert Table |
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| State / province | Idaho |
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| Volcanic field | vitrophyre of tuff of The Badlands |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 12 |
|
11.8 |
12.2 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 74.78 | | WT% | XRF |
| AL2O3 | 12.71 | | WT% | XRF |
| FE2O3 | 1.4 | | WT% | XRF |
| FEO | 0.66 | | WT% | XRF |
| MGO | 0.04 | | WT% | XRF |
| CAO | 0.83 | | WT% | XRF |
| NA2O | 2.86 | | WT% | XRF |
| K2O | 5.73 | | WT% | XRF |
| H2O_PLUS | 1.53 | | WT% | XRF |
| H2O_MINUS | 0.38 | | WT% | XRF |
| TIO2 | 0.27 | | WT% | XRF |
| P2O5 | 0.06 | | WT% | XRF |
| MNO | 0.034 | | WT% | XRF |
| CO2 | 0.46 | | WT% | XRF |
| TOTAL | 101.74 | | WT% | XRF |
