← Search
Sample BL-55A
NavDat sample number 8417 · PHONOLITE
Sample
| Sample ID | BL-55A |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | porphyritic; aphanitic, trachytic to randomly oriented groundmass of orthoclase and aegirine-agute; phenocrysts of aegirine-augite, sanidine, hauyne, and melanite garnet |
|---|
Location
| Latitude | 44.4787 |
|---|
| Longitude | -104.484 |
|---|
| 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 |
|
|
