Sample 118
NavDat sample number 2707 · PHONOLITE
Sample
| Sample ID | 118 |
|---|---|
| Rock name | PHONOLITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | phenocrysts of alkali feldspar, aegirine-augite, aegirine; groundmass of sodalite, feldspar, aegirine |
Location
| Latitude | 44.4101 |
|---|---|
| Longitude | -103.875 |
| Location | Rubicon Gulch |
| State / province | South Dakota |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 49 | 39 | 60 |