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Sample BL-6-289
NavDat sample number 5871 · RHYOLITE
Sample
| Sample ID | BL-6-289 |
|---|
| Rock name | RHYOLITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | from drill core at 289 ft depth |
|---|
Location
| Latitude | 44.3833 |
|---|
| Longitude | -103.817 |
|---|
| State / province | South Dakota |
|---|
| Volcanic field | Northern Cutting Stock, Black Hills Tertiary igneous province |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 50 |
|
45 |
55 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 70.9 | | WT% | WET |
| AL2O3 | 15.1 | | WT% | WET |
| CAO | 0.28 | | WT% | WET |
| NA2O | 4 | | WT% | WET |
| K2O | 6.5 | | WT% | WET |
