Sample 91-169
NavDat sample number 36170 · RHYOLITE
Sample
| Sample ID | 91-169 |
|---|---|
| Rock name | RHYOLITE |
| Rock type | VOLCANIC |
| Composition | FELSIC |
| Material | IGNEOUS |
| Comment | medium-gray, porphyritic; found in Archean gneiss; phenocrysts of quartz and feldspar |
Location
| Latitude | 44.8936 |
|---|---|
| Longitude | -112.944 |
| State / province | Montana |
| Volcanic field | Challis Volcanic Group |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 53.35 | 53.2 | 53.5 |
Analyses
No chemical analyses are stored for this sample.