← Search
Sample 156
NavDat sample number 11411 · PHONOLITE
Sample
| Sample ID | 156 |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | coarsely porphyritic with hiatal texture between cm and mm scale sanidine phenocrysts; trachytic holocrystalline matrix of Na sanidine, aegirine, and feldspathoid; phenocrysts of feldspathoid, sanidine, clinopyroxene, and minor magnetite and occasional amphibole |
|---|
Location
| Latitude | 42.7392 |
|---|
| Longitude | -107.306 |
|---|
| Location | Rattlesnake Hills |
|---|
| State / province | Wyoming |
|---|
| Volcanic field | Group A phonolite |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 43.6 |
|
41.4 |
46.6 |
|
|
