← Search
Sample 35-17
NavDat sample number 8438 · PHONOLITE
Sample
| Sample ID | 35-17 |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | porphyritic; phenocrysts of sanidine, Na-ferroaugite, natrolite pseudomorphs of nepheline, melanite, and sphene; groundmass of microcrystalline sanidine, acicular Na-ferroaugite, dolomite, magnetite, and apatite |
|---|
Location
| Latitude | 44.5348 |
|---|
| Longitude | -104.504 |
|---|
| Location | Bear Lodge Mountain igneous complex |
|---|
| State / province | Wyoming |
|---|
| Volcanic field | Lytle Creek area |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 42 |
|
36.7 |
63.5 |
|
|
