← Search
Sample BL-5A
NavDat sample number 8408 · PHONOLITE
Sample
| Sample ID | BL-5A |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | pronounced porphyritic texture and aphanitic groundmass; holocrystalline; phenocrysts of sanidine, aegirine-augite, hauyne, and sphene; trachytic groundmass of orthoclase and smaller amounts of aegirine and magnetite? |
|---|
Location
| Latitude | 44.4442 |
|---|
| Longitude | -104.44 |
|---|
| Location | Bear Lodge Mountains, Houston Creek area |
|---|
| State / province | Wyoming |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 43.9 |
|
36.7 |
51.1 |
|
|
