← Search
Sample 116W
NavDat sample number 11388 · PHONOLITE
Sample
| Sample ID | 116W |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | weathered; porphyritic; trachytic holocrystalline matrix of sanidine needles, pyroxene, and feldspathoid; phenocrysts of feldspathoid, sanidine, which show strong flow foliation, and minor pyroxene; also microphenocrysts 1 mm length of sanidine |
|---|
Location
| Latitude | 42.7658 |
|---|
| Longitude | -107.288 |
|---|
| Location | Rattlesnake Hills |
|---|
| State / province | Wyoming |
|---|
| Volcanic field | Group B phonolite |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 43.6 |
|
41.4 |
46.6 |
|
|
