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Sample R - rhyodacite
NavDat sample number 4933 · RHYODACITE
Sample
| Sample ID | R - rhyodacite |
|---|
| Rock name | RHYODACITE |
|---|
| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
|---|
| Comment | medium gray, coarsely porphyritic; phenocrysts of oligoclase and oxyhornblende; orthoclase and quartz groundmass |
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Location
| Latitude | 42.7825 |
|---|
| Longitude | -107.264 |
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| Location | Garfield Peak |
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| State / province | Wyoming |
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| Volcanic field | Rattlesnake Hills igneous complex |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 44 |
|
41.4 |
46.6 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 68 | | WT% | AAS |
| AL2O3 | 16.1 | | WT% | AAS |
| FE2O3T | 2.6 | | WT% | AAS |
| MGO | 0.54 | | WT% | AAS |
| CAO | 2.55 | | WT% | AAS |
| NA2O | 5.06 | | WT% | AAS |
| K2O | 3.47 | | WT% | AAS |
| TIO2 | 0.25 | | WT% | AAS |
| MNO | 0.05 | | WT% | AAS |
| TOTAL | 98.62 | | WT% | AAS |
