Sample 134
NavDat sample number 2703 · PHONOLITE
Sample
| Sample ID | 134 |
|---|---|
| Rock name | PHONOLITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | microcrystalline and hypidiomorphic groundmass of alkali feldspar, microlites of aegirine, nepheline, and minor sodalite; phenocrysts of feldspar, pyroxene, and nosean |
Location
| Latitude | 44.383 |
|---|---|
| Longitude | -103.817 |
| Location | False Bottom Creek |
| State / province | South Dakota |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 49 | 39 | 60 |