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Sample 1-102
NavDat sample number 4758 · RHYOLITE
Sample
| Sample ID | 1-102 |
|---|
| 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 | 44.3971 |
|---|
| Longitude | -103.8 |
|---|
| 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 | 23.056 | | WT% | NAA |
| FE2O3 | 1.1276 | | WT% | NAA |
| MGO | 3.6809 | | WT% | NAA |
| CAO | 2.445 | | WT% | NAA |
| NA2O | 2.5567 | | WT% | NAA |
| TIO2 | 0.2865 | | WT% | NAA |
| MNO | 0.0047 | | WT% | NAA |
| BA | 483.47 | | PPM | NAA |
| CE | 199.288 | | PPM | NAA |
| CO | 0.8412 | | PPM | NAA |
| CR | 2.8179 | | PPM | NAA |
| CS | 8.0803 | | PPM | NAA |
| EU | 0.8056 | | PPM | NAA |
| HF | 3.6265 | | PPM | NAA |
| LA | 12.0472 | | PPM | NAA |
| LU | 0.5367 | | PPM | NAA |
| RB | 153.651 | | PPM | NAA |
| SB | 0.2998 | | PPM | NAA |
| SC | 0.2691 | | PPM | NAA |
| SM | 3.884 | | PPM | NAA |
| TA | 2.1818 | | PPM | NAA |
| TH | 12.5552 | | PPM | NAA |
| V | 11.2135 | | PPM | NAA |
| YB | 1.939 | | PPM | NAA |
