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Sample K-20
NavDat sample number 41036 · RHYOLITE
Sample
| Sample ID | K-20 |
|---|
| Rock name | RHYOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Collected by | Kistler |
|---|
| Comment | Rochester Rhyolite |
|---|
Location
| Latitude | 40.325 |
|---|
| Longitude | -118.118 |
|---|
| State / province | Nevada |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 168.6 |
|
159.3 |
177.9 |
|
|
Analyses
Mineral
| Item | Value | Std. dev. | Unit | Method |
|---|
| RB | 151 | | PPM | XRF |
| SR | 154 | | PPM | XRF |
| SIO2 | 68.8 | | WT% | XRF |
| NA2O | 4.23 | | WT% | XRF |
| K2O | 4.67 | | WT% | XRF |
References
- Kistler, R W; Speed, R C (2000) (super 40) Ar/ (super 39) Ar, K-Ar, Rb-Sr whole-rock and mineral ages,chemical composition... isotopicsystematics of Jurassic Humboldt Lopolith and Permian(?) and TriassicKoipato Group rocks, Pershing and Chruchill counties, Nevada. Open-File Report - U. S. Geological Survey, Report: OF 00-0217, 14pp., 2000
