Sample GAD-11
NavDat sample number 12151 · ANDESITE
Sample
| Sample ID | GAD-11 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | Dark gray, abundantly finely seriate porphyritic with plagioclase and minor augite and sanidine set in pilotaxitic groundmass |
Location
| Latitude | 40.4 |
|---|---|
| Longitude | -120.163 |
| State / province | California |
| Volcanic field | Walker Lane |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 11.8 | 11.2 | 12.4 |