← Search
Sample 1-49
NavDat sample number 4725 · RHYOLITE
Sample
| Sample ID | 1-49 |
|---|
| 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 | 44.315 |
|---|
| Longitude | -103.785 |
|---|
| 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 | 4.9698 | | WT% | NAA |
| FE2O3 | 3.1771 | | WT% | NAA |
| MGO | 0.9805 | | WT% | NAA |
| CAO | 4.4418 | | WT% | NAA |
| NA2O | 6.9484 | | WT% | NAA |
| TIO2 | 0.1165 | | WT% | NAA |
| MNO | 0.0456 | | WT% | NAA |
| BA | 754.96 | | PPM | NAA |
| CE | 567.124 | | PPM | NAA |
| CO | 3.5178 | | PPM | NAA |
| CR | 14.7739 | | PPM | NAA |
| CS | 17.6995 | | PPM | NAA |
| EU | 2.4983 | | PPM | NAA |
| HF | 10.2066 | | PPM | NAA |
| LA | 124.222 | | PPM | NAA |
| LU | 0.5561 | | PPM | NAA |
| RB | 108.124 | | PPM | NAA |
| SB | 0.2597 | | PPM | NAA |
| SC | 1.6463 | | PPM | NAA |
| SM | 10.7263 | | PPM | NAA |
| TA | 1.6607 | | PPM | NAA |
| TH | 61.8613 | | PPM | NAA |
| V | 16.0087 | | PPM | NAA |
| YB | 4.0466 | | PPM | NAA |
