← Search
Sample 1-103
NavDat sample number 4759 · RHYOLITE
Sample
| Sample ID | 1-103 |
|---|
| Rock name | RHYOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | a few plagioclase phenocrysts in an aphanitic groundmass; groundmass is extremely fine and primarily composed of orthoclase and quartz; pyroxenes also present |
|---|
Location
| Latitude | 44.3993 |
|---|
| Longitude | -103.808 |
|---|
| State / province | South Dakota |
|---|
| Volcanic field | Black Hill Tertiary igneous province |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 47 |
|
40 |
55 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| AL2O3 | 16.099 | | WT% | NAA |
| FE2O3 | 3.1868 | | WT% | NAA |
| MGO | 3.322 | | WT% | NAA |
| CAO | 0.9079 | | WT% | NAA |
| NA2O | 7.705 | | WT% | NAA |
| TIO2 | 0.6042 | | WT% | NAA |
| MNO | 0.1411 | | WT% | NAA |
| BA | 545.7 | | PPM | NAA |
| CE | 493.476 | | PPM | NAA |
| CO | 2.8322 | | PPM | NAA |
| CR | 20.0116 | | PPM | NAA |
| CS | 6.0493 | | PPM | NAA |
| EU | 4.0038 | | PPM | NAA |
| HF | 9.8198 | | PPM | NAA |
| LA | 147.808 | | PPM | NAA |
| LU | 0.7079 | | PPM | NAA |
| RB | 180.807 | | PPM | NAA |
| SB | 0.3834 | | PPM | NAA |
| SC | 1.5596 | | PPM | NAA |
| SM | 17.423 | | PPM | NAA |
| TA | 2.9401 | | PPM | NAA |
| TH | 65.5978 | | PPM | NAA |
| V | 62.997 | | PPM | NAA |
| YB | 3.8589 | | PPM | NAA |
